Lookup for vulnerable packages by Package URL.

Purlpkg:deb/debian/h2o@0?distro=bullseye
Typedeb
Namespacedebian
Nameh2o
Version0
Qualifiers
distro bullseye
Subpath
Is_vulnerablefalse
Next_non_vulnerable_version2.2.3+dfsg-1
Latest_non_vulnerable_version2.2.5+dfsg2-7
Affected_by_vulnerabilities
Fixing_vulnerabilities
0
url VCID-a87p-5cc2-c7g4
vulnerability_id VCID-a87p-5cc2-c7g4
summary Directory traversal vulnerability in H2O before 1.4.5 and 1.5.x before 1.5.0-beta2, when the file.dir directive is enabled, allows remote attackers to read arbitrary files via a crafted URL.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2015-5638
reference_id
reference_type
scores
0
value 0.00242
scoring_system epss
scoring_elements 0.47388
published_at 2026-04-01T12:55:00Z
1
value 0.00242
scoring_system epss
scoring_elements 0.47421
published_at 2026-04-02T12:55:00Z
2
value 0.00242
scoring_system epss
scoring_elements 0.47442
published_at 2026-04-12T12:55:00Z
3
value 0.00242
scoring_system epss
scoring_elements 0.47392
published_at 2026-04-07T12:55:00Z
4
value 0.00242
scoring_system epss
scoring_elements 0.47447
published_at 2026-04-08T12:55:00Z
5
value 0.00242
scoring_system epss
scoring_elements 0.47444
published_at 2026-04-09T12:55:00Z
6
value 0.00242
scoring_system epss
scoring_elements 0.47467
published_at 2026-04-11T12:55:00Z
7
value 0.00242
scoring_system epss
scoring_elements 0.47448
published_at 2026-04-13T12:55:00Z
8
value 0.00242
scoring_system epss
scoring_elements 0.47508
published_at 2026-04-16T12:55:00Z
9
value 0.00242
scoring_system epss
scoring_elements 0.475
published_at 2026-04-18T12:55:00Z
10
value 0.00242
scoring_system epss
scoring_elements 0.47451
published_at 2026-04-21T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2015-5638
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2015-5638
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-a87p-5cc2-c7g4
1
url VCID-bja7-a3uf-zqer
vulnerability_id VCID-bja7-a3uf-zqer
summary h2o is an open source http server. In code prior to the `8c0eca3` commit h2o may attempt to access uninitialized memory. When receiving QUIC frames in certain order, HTTP/3 server-side implementation of h2o can be misguided to treat uninitialized memory as HTTP/3 frames that have been received. When h2o is used as a reverse proxy, an attacker can abuse this vulnerability to send internal state of h2o to backend servers controlled by the attacker or third party. Also, if there is an HTTP endpoint that reflects the traffic sent from the client, an attacker can use that reflector to obtain internal state of h2o. This internal state includes traffic of other connections in unencrypted form and TLS session tickets. This vulnerability exists in h2o server with HTTP/3 support, between commit 93af138 and d1f0f65. None of the released versions of h2o are affected by this vulnerability. There are no known workarounds. Users of unreleased versions of h2o using HTTP/3 are advised to upgrade immediately.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-43848
reference_id
reference_type
scores
0
value 0.133
scoring_system epss
scoring_elements 0.94189
published_at 2026-04-21T12:55:00Z
1
value 0.133
scoring_system epss
scoring_elements 0.94136
published_at 2026-04-02T12:55:00Z
2
value 0.133
scoring_system epss
scoring_elements 0.94168
published_at 2026-04-11T12:55:00Z
3
value 0.133
scoring_system epss
scoring_elements 0.94169
published_at 2026-04-13T12:55:00Z
4
value 0.133
scoring_system epss
scoring_elements 0.94184
published_at 2026-04-16T12:55:00Z
5
value 0.133
scoring_system epss
scoring_elements 0.94126
published_at 2026-04-01T12:55:00Z
6
value 0.133
scoring_system epss
scoring_elements 0.94147
published_at 2026-04-04T12:55:00Z
7
value 0.133
scoring_system epss
scoring_elements 0.9415
published_at 2026-04-07T12:55:00Z
8
value 0.133
scoring_system epss
scoring_elements 0.94159
published_at 2026-04-08T12:55:00Z
9
value 0.133
scoring_system epss
scoring_elements 0.94163
published_at 2026-04-09T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-43848
1
reference_url https://github.com/h2o/h2o/commit/8c0eca3
reference_id 8c0eca3
reference_type
scores
0
value 7.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:11:27Z/
url https://github.com/h2o/h2o/commit/8c0eca3
2
reference_url https://github.com/h2o/h2o/security/advisories/GHSA-f9xw-j925-m4m4
reference_id GHSA-f9xw-j925-m4m4
reference_type
scores
0
value 7.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:11:27Z/
url https://github.com/h2o/h2o/security/advisories/GHSA-f9xw-j925-m4m4
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2021-43848
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-bja7-a3uf-zqer
2
url VCID-e3m7-psun-vfby
vulnerability_id VCID-e3m7-psun-vfby
summary h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The QUIC stack (quicly), as used by H2O up to commit 43f86e5 (in version 2.3.0-beta and prior), is susceptible to a state exhaustion attack. When H2O is serving HTTP/3, a remote attacker can exploit this vulnerability to progressively increase the memory retained by the QUIC stack. This can eventually cause H2O to abort due to memory exhaustion. The vulnerability has been resolved in commit d67e81d03be12a9d53dc8271af6530f40164cd35. HTTP/1 and HTTP/2 are not affected by this vulnerability as they do not use QUIC. Administrators looking to mitigate this issue without upgrading can disable HTTP/3 support.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2023-50247
reference_id
reference_type
scores
0
value 0.00562
scoring_system epss
scoring_elements 0.68283
published_at 2026-04-02T12:55:00Z
1
value 0.00562
scoring_system epss
scoring_elements 0.68303
published_at 2026-04-04T12:55:00Z
2
value 0.00562
scoring_system epss
scoring_elements 0.6828
published_at 2026-04-07T12:55:00Z
3
value 0.00562
scoring_system epss
scoring_elements 0.68331
published_at 2026-04-08T12:55:00Z
4
value 0.00562
scoring_system epss
scoring_elements 0.68347
published_at 2026-04-09T12:55:00Z
5
value 0.00562
scoring_system epss
scoring_elements 0.68373
published_at 2026-04-11T12:55:00Z
6
value 0.00562
scoring_system epss
scoring_elements 0.6836
published_at 2026-04-12T12:55:00Z
7
value 0.00562
scoring_system epss
scoring_elements 0.68328
published_at 2026-04-13T12:55:00Z
8
value 0.00562
scoring_system epss
scoring_elements 0.68367
published_at 2026-04-16T12:55:00Z
9
value 0.00562
scoring_system epss
scoring_elements 0.6838
published_at 2026-04-18T12:55:00Z
10
value 0.00562
scoring_system epss
scoring_elements 0.68359
published_at 2026-04-21T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2023-50247
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2023-50247
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-e3m7-psun-vfby
3
url VCID-gwvf-vrtr-v3dk
vulnerability_id VCID-gwvf-vrtr-v3dk
summary Use-after-free vulnerability in H2O allows remote attackers to cause a denial-of-service (DoS) or obtain server certificate private keys and possibly other information.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2016-7835
reference_id
reference_type
scores
0
value 0.03157
scoring_system epss
scoring_elements 0.86854
published_at 2026-04-01T12:55:00Z
1
value 0.03157
scoring_system epss
scoring_elements 0.86865
published_at 2026-04-02T12:55:00Z
2
value 0.03157
scoring_system epss
scoring_elements 0.86884
published_at 2026-04-04T12:55:00Z
3
value 0.03157
scoring_system epss
scoring_elements 0.86878
published_at 2026-04-07T12:55:00Z
4
value 0.03157
scoring_system epss
scoring_elements 0.86898
published_at 2026-04-08T12:55:00Z
5
value 0.03157
scoring_system epss
scoring_elements 0.86906
published_at 2026-04-09T12:55:00Z
6
value 0.03157
scoring_system epss
scoring_elements 0.86919
published_at 2026-04-11T12:55:00Z
7
value 0.03157
scoring_system epss
scoring_elements 0.86915
published_at 2026-04-12T12:55:00Z
8
value 0.03157
scoring_system epss
scoring_elements 0.86909
published_at 2026-04-13T12:55:00Z
9
value 0.03157
scoring_system epss
scoring_elements 0.86926
published_at 2026-04-16T12:55:00Z
10
value 0.03157
scoring_system epss
scoring_elements 0.86931
published_at 2026-04-21T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2016-7835
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2016-7835
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-gwvf-vrtr-v3dk
4
url VCID-k8g5-d8xx-3ye4
vulnerability_id VCID-k8g5-d8xx-3ye4
summary H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2016-4864
reference_id
reference_type
scores
0
value 0.01598
scoring_system epss
scoring_elements 0.81619
published_at 2026-04-01T12:55:00Z
1
value 0.01598
scoring_system epss
scoring_elements 0.8163
published_at 2026-04-02T12:55:00Z
2
value 0.01598
scoring_system epss
scoring_elements 0.81652
published_at 2026-04-04T12:55:00Z
3
value 0.01598
scoring_system epss
scoring_elements 0.8165
published_at 2026-04-07T12:55:00Z
4
value 0.01598
scoring_system epss
scoring_elements 0.81677
published_at 2026-04-08T12:55:00Z
5
value 0.01598
scoring_system epss
scoring_elements 0.81681
published_at 2026-04-09T12:55:00Z
6
value 0.01598
scoring_system epss
scoring_elements 0.81701
published_at 2026-04-11T12:55:00Z
7
value 0.01598
scoring_system epss
scoring_elements 0.81689
published_at 2026-04-12T12:55:00Z
8
value 0.01598
scoring_system epss
scoring_elements 0.81682
published_at 2026-04-13T12:55:00Z
9
value 0.01598
scoring_system epss
scoring_elements 0.81721
published_at 2026-04-16T12:55:00Z
10
value 0.01598
scoring_system epss
scoring_elements 0.8172
published_at 2026-04-18T12:55:00Z
11
value 0.01598
scoring_system epss
scoring_elements 0.81724
published_at 2026-04-21T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2016-4864
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2016-4864
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-k8g5-d8xx-3ye4
5
url VCID-kn2d-fupu-wbam
vulnerability_id VCID-kn2d-fupu-wbam
summary CRLF injection vulnerability in the on_req function in lib/handler/redirect.c in H2O before 1.6.2 and 1.7.x before 1.7.0-beta3 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted URI.
references
0
reference_url http://jvndb.jvn.jp/jvndb/JVNDB-2016-000003
reference_id
reference_type
scores
url http://jvndb.jvn.jp/jvndb/JVNDB-2016-000003
1
reference_url http://jvn.jp/en/jp/JVN45928828/index.html
reference_id
reference_type
scores
url http://jvn.jp/en/jp/JVN45928828/index.html
2
reference_url https://api.first.org/data/v1/epss?cve=CVE-2016-1133
reference_id
reference_type
scores
0
value 0.00386
scoring_system epss
scoring_elements 0.59804
published_at 2026-04-21T12:55:00Z
1
value 0.00386
scoring_system epss
scoring_elements 0.59821
published_at 2026-04-18T12:55:00Z
2
value 0.00386
scoring_system epss
scoring_elements 0.59658
published_at 2026-04-01T12:55:00Z
3
value 0.00386
scoring_system epss
scoring_elements 0.59732
published_at 2026-04-02T12:55:00Z
4
value 0.00386
scoring_system epss
scoring_elements 0.59756
published_at 2026-04-04T12:55:00Z
5
value 0.00386
scoring_system epss
scoring_elements 0.59726
published_at 2026-04-07T12:55:00Z
6
value 0.00386
scoring_system epss
scoring_elements 0.59778
published_at 2026-04-08T12:55:00Z
7
value 0.00386
scoring_system epss
scoring_elements 0.59792
published_at 2026-04-09T12:55:00Z
8
value 0.00386
scoring_system epss
scoring_elements 0.59811
published_at 2026-04-11T12:55:00Z
9
value 0.00386
scoring_system epss
scoring_elements 0.59795
published_at 2026-04-12T12:55:00Z
10
value 0.00386
scoring_system epss
scoring_elements 0.59777
published_at 2026-04-13T12:55:00Z
11
value 0.00386
scoring_system epss
scoring_elements 0.59814
published_at 2026-04-16T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2016-1133
3
reference_url https://github.com/h2o/h2o/issues/682
reference_id
reference_type
scores
url https://github.com/h2o/h2o/issues/682
4
reference_url https://github.com/h2o/h2o/issues/684
reference_id
reference_type
scores
url https://github.com/h2o/h2o/issues/684
5
reference_url https://h2o.examp1e.net/vulnerabilities.html#CVE-2016-1133
reference_id
reference_type
scores
url https://h2o.examp1e.net/vulnerabilities.html#CVE-2016-1133
6
reference_url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*
reference_id cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*
reference_type
scores
url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*
7
reference_url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:1.7.0:beta2:*:*:*:*:*:*
reference_id cpe:2.3:a:dena:h2o:1.7.0:beta2:*:*:*:*:*:*
reference_type
scores
url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:1.7.0:beta2:*:*:*:*:*:*
8
reference_url https://nvd.nist.gov/vuln/detail/CVE-2016-1133
reference_id CVE-2016-1133
reference_type
scores
0
value 4.3
scoring_system cvssv2
scoring_elements AV:N/AC:M/Au:N/C:N/I:P/A:N
1
value 3.7
scoring_system cvssv3
scoring_elements CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
url https://nvd.nist.gov/vuln/detail/CVE-2016-1133
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2016-1133
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-kn2d-fupu-wbam
6
url VCID-p463-b1yc-jkev
vulnerability_id VCID-p463-b1yc-jkev
summary H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information to back end HTTP servers. Pull request number 3229 fixes the issue. The pull request has been merged to the `master` branch in commit f010336. Users should upgrade to commit f010336 or later.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2023-30847
reference_id
reference_type
scores
0
value 0.00348
scoring_system epss
scoring_elements 0.57394
published_at 2026-04-18T12:55:00Z
1
value 0.00348
scoring_system epss
scoring_elements 0.57396
published_at 2026-04-08T12:55:00Z
2
value 0.00348
scoring_system epss
scoring_elements 0.57398
published_at 2026-04-16T12:55:00Z
3
value 0.00348
scoring_system epss
scoring_elements 0.57413
published_at 2026-04-11T12:55:00Z
4
value 0.00348
scoring_system epss
scoring_elements 0.57393
published_at 2026-04-12T12:55:00Z
5
value 0.00348
scoring_system epss
scoring_elements 0.57372
published_at 2026-04-21T12:55:00Z
6
value 0.00348
scoring_system epss
scoring_elements 0.57346
published_at 2026-04-02T12:55:00Z
7
value 0.00348
scoring_system epss
scoring_elements 0.57368
published_at 2026-04-04T12:55:00Z
8
value 0.00348
scoring_system epss
scoring_elements 0.57344
published_at 2026-04-07T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2023-30847
1
reference_url https://github.com/h2o/h2o/pull/3229
reference_id 3229
reference_type
scores
0
value 8.2
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-30T19:51:39Z/
url https://github.com/h2o/h2o/pull/3229
2
reference_url https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33
reference_id f010336bab162839df43d9e87570897466c97e33
reference_type
scores
0
value 8.2
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-30T19:51:39Z/
url https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33
3
reference_url https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx
reference_id GHSA-p5hj-phwj-hrvx
reference_type
scores
0
value 8.2
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-30T19:51:39Z/
url https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2023-30847
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-p463-b1yc-jkev
7
url VCID-vgst-7jj7-cuet
vulnerability_id VCID-vgst-7jj7-cuet
summary h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service attack. By default, the h2o standalone server automatically restarts, minimizing the impact. However, HTTP requests that were served concurrently will still be disrupted. The vulnerability has been addressed in commit 1ed32b2. Users may disable the use of HTTP/3 to mitigate the issue.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2024-45403
reference_id
reference_type
scores
0
value 0.0033
scoring_system epss
scoring_elements 0.56018
published_at 2026-04-21T12:55:00Z
1
value 0.0033
scoring_system epss
scoring_elements 0.56001
published_at 2026-04-04T12:55:00Z
2
value 0.0033
scoring_system epss
scoring_elements 0.56031
published_at 2026-04-08T12:55:00Z
3
value 0.0033
scoring_system epss
scoring_elements 0.56034
published_at 2026-04-09T12:55:00Z
4
value 0.0033
scoring_system epss
scoring_elements 0.56044
published_at 2026-04-11T12:55:00Z
5
value 0.0033
scoring_system epss
scoring_elements 0.56024
published_at 2026-04-12T12:55:00Z
6
value 0.0033
scoring_system epss
scoring_elements 0.56006
published_at 2026-04-13T12:55:00Z
7
value 0.0033
scoring_system epss
scoring_elements 0.56042
published_at 2026-04-16T12:55:00Z
8
value 0.0033
scoring_system epss
scoring_elements 0.56045
published_at 2026-04-18T12:55:00Z
9
value 0.0033
scoring_system epss
scoring_elements 0.5598
published_at 2026-04-07T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2024-45403
1
reference_url https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562
reference_id 16b13eee8ad7895b4fe3fcbcabee53bd52782562
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562
2
reference_url https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c
reference_id 1ed32b23f999acf0c5029f09c8525f93eb1d354c
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c
3
reference_url https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92
reference_id GHSA-4xp5-3jhc-3m92
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92
4
reference_url https://h2o.examp1e.net/configure/http3_directives.html
reference_id http3_directives.html
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://h2o.examp1e.net/configure/http3_directives.html
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2024-45403
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-vgst-7jj7-cuet
8
url VCID-ydjm-jrpz-bbgs
vulnerability_id VCID-ydjm-jrpz-bbgs
summary lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.
references
0
reference_url http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091
reference_id
reference_type
scores
url http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091
1
reference_url http://jvn.jp/en/jp/JVN87859762/index.html
reference_id
reference_type
scores
url http://jvn.jp/en/jp/JVN87859762/index.html
2
reference_url https://api.first.org/data/v1/epss?cve=CVE-2016-4817
reference_id
reference_type
scores
0
value 0.07964
scoring_system epss
scoring_elements 0.9208
published_at 2026-04-21T12:55:00Z
1
value 0.07964
scoring_system epss
scoring_elements 0.92081
published_at 2026-04-18T12:55:00Z
2
value 0.07964
scoring_system epss
scoring_elements 0.9204
published_at 2026-04-01T12:55:00Z
3
value 0.07964
scoring_system epss
scoring_elements 0.92045
published_at 2026-04-02T12:55:00Z
4
value 0.07964
scoring_system epss
scoring_elements 0.92053
published_at 2026-04-04T12:55:00Z
5
value 0.07964
scoring_system epss
scoring_elements 0.92058
published_at 2026-04-07T12:55:00Z
6
value 0.07964
scoring_system epss
scoring_elements 0.9207
published_at 2026-04-08T12:55:00Z
7
value 0.07964
scoring_system epss
scoring_elements 0.92073
published_at 2026-04-13T12:55:00Z
8
value 0.07964
scoring_system epss
scoring_elements 0.92077
published_at 2026-04-12T12:55:00Z
9
value 0.07964
scoring_system epss
scoring_elements 0.92084
published_at 2026-04-16T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2016-4817
3
reference_url https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
reference_id
reference_type
scores
url https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
4
reference_url https://github.com/h2o/h2o/pull/920
reference_id
reference_type
scores
url https://github.com/h2o/h2o/pull/920
5
reference_url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*
reference_id cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*
reference_type
scores
url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*
6
reference_url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:*:beta4:*:*:*:*:*:*
reference_id cpe:2.3:a:dena:h2o:*:beta4:*:*:*:*:*:*
reference_type
scores
url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dena:h2o:*:beta4:*:*:*:*:*:*
7
reference_url https://nvd.nist.gov/vuln/detail/CVE-2016-4817
reference_id CVE-2016-4817
reference_type
scores
0
value 5.0
scoring_system cvssv2
scoring_elements AV:N/AC:L/Au:N/C:N/I:N/A:P
1
value 7.5
scoring_system cvssv3
scoring_elements CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
url https://nvd.nist.gov/vuln/detail/CVE-2016-4817
fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
aliases CVE-2016-4817
risk_score null
exploitability null
weighted_severity null
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-ydjm-jrpz-bbgs
Risk_scorenull
Resource_urlhttp://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye