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Vulnerability details: VCID-ja9y-54rf-aaab
Vulnerability ID VCID-ja9y-54rf-aaab
Aliases CVE-2021-22959
Summary The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
rhas Moderate https://access.redhat.com/errata/RHSA-2021:5171
rhas Moderate https://access.redhat.com/errata/RHSA-2022:0041
rhas Moderate https://access.redhat.com/errata/RHSA-2022:0246
rhas Moderate https://access.redhat.com/errata/RHSA-2022:0350
rhas Moderate https://access.redhat.com/errata/RHSA-2022:4914
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22959.json
epss 0.00198 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00198 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00198 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00198 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00198 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
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epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00217 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00241 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00241 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00241 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00241 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00485 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00687 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00687 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00687 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.00687 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
epss 0.02248 https://api.first.org/data/v1/epss?cve=CVE-2021-22959
rhbs low https://bugzilla.redhat.com/show_bug.cgi?id=2014057
cvssv3.1 6.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.4 https://nvd.nist.gov/vuln/detail/CVE-2021-22959
cvssv3 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-22959
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-22959
archlinux Medium https://security.archlinux.org/AVG-2460
cvssv3.1 6.6 https://www.oracle.com/security-alerts/cpujan2022.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpujan2022.html
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22959.json
https://api.first.org/data/v1/epss?cve=CVE-2021-22959
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22959
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22960
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44531
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44532
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44533
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21824
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://hackerone.com/reports/1238709
https://www.debian.org/security/2022/dsa-5170
https://www.oracle.com/security-alerts/cpujan2022.html
2014057 https://bugzilla.redhat.com/show_bug.cgi?id=2014057
ASA-202110-4 https://security.archlinux.org/ASA-202110-4
AVG-2460 https://security.archlinux.org/AVG-2460
cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:*
cpe:2.3:a:oracle:graalvm:20.3.4:*:*:*:enterprise:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:graalvm:20.3.4:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm:21.3.0:*:*:*:enterprise:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:graalvm:21.3.0:*:*:*:enterprise:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CVE-2021-22959 https://nvd.nist.gov/vuln/detail/CVE-2021-22959
GLSA-202405-29 https://security.gentoo.org/glsa/202405-29
RHSA-2021:5171 https://access.redhat.com/errata/RHSA-2021:5171
RHSA-2022:0041 https://access.redhat.com/errata/RHSA-2022:0041
RHSA-2022:0246 https://access.redhat.com/errata/RHSA-2022:0246
RHSA-2022:0350 https://access.redhat.com/errata/RHSA-2022:0350
RHSA-2022:4914 https://access.redhat.com/errata/RHSA-2022:4914
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22959.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22959
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22959
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22959
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://www.oracle.com/security-alerts/cpujan2022.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.39013
EPSS Score 0.00198
Published At April 5, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.