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Vulnerability details: VCID-4c3m-m6ku-kbhq
Vulnerability ID VCID-4c3m-m6ku-kbhq
Aliases CVE-2023-27522
GHSA-vcph-37mh-fqrh
Summary HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
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
CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-27522.json
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
epss 0.00781 https://api.first.org/data/v1/epss?cve=CVE-2023-27522
cvssv3.1 5.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-vcph-37mh-fqrh
cvssv3.1 7.5 https://github.com/apache/httpd/commit/d753ea76b5972a85349b68c31b59d04c60014f2d
generic_textual HIGH https://github.com/apache/httpd/commit/d753ea76b5972a85349b68c31b59d04c60014f2d
cvssv3.1 7.5 https://github.com/unbit/uwsgi
generic_textual HIGH https://github.com/unbit/uwsgi
cvssv3.1 7.5 https://github.com/unbit/uwsgi/commit/58ee1df31fa9e9af106aaeabb82374c36b433822
generic_textual HIGH https://github.com/unbit/uwsgi/commit/58ee1df31fa9e9af106aaeabb82374c36b433822
cvssv3.1 7.5 https://github.com/unbit/uwsgi/commit/acb03530aaaeaa810f28a5b64da619525940f569
generic_textual HIGH https://github.com/unbit/uwsgi/commit/acb03530aaaeaa810f28a5b64da619525940f569
cvssv3.1 7.5 https://httpd.apache.org/security/vulnerabilities_24.html
generic_textual HIGH https://httpd.apache.org/security/vulnerabilities_24.html
ssvc Track https://httpd.apache.org/security/vulnerabilities_24.html
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
ssvc Track https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2023-27522
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2023-27522
cvssv3.1 7.5 https://security.gentoo.org/glsa/202309-01
generic_textual HIGH https://security.gentoo.org/glsa/202309-01
ssvc Track https://security.gentoo.org/glsa/202309-01
cvssv3.1 7.5 https://uwsgi-docs.readthedocs.io/en/latest/Changelog-2.0.22.html
generic_textual HIGH https://uwsgi-docs.readthedocs.io/en/latest/Changelog-2.0.22.html
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-27522.json
https://api.first.org/data/v1/epss?cve=CVE-2023-27522
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-20001
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-36760
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-37436
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-25690
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-27522
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/apache/httpd/commit/d753ea76b5972a85349b68c31b59d04c60014f2d
https://github.com/unbit/uwsgi
https://github.com/unbit/uwsgi/commit/58ee1df31fa9e9af106aaeabb82374c36b433822
https://github.com/unbit/uwsgi/commit/acb03530aaaeaa810f28a5b64da619525940f569
https://httpd.apache.org/security/vulnerabilities_24.html
https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
https://security.gentoo.org/glsa/202309-01
https://uwsgi-docs.readthedocs.io/en/latest/Changelog-2.0.22.html
1032476 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1032476
2176211 https://bugzilla.redhat.com/show_bug.cgi?id=2176211
CVE-2023-27522 https://httpd.apache.org/security/json/CVE-2023-27522.json
CVE-2023-27522 https://nvd.nist.gov/vuln/detail/CVE-2023-27522
GHSA-vcph-37mh-fqrh https://github.com/advisories/GHSA-vcph-37mh-fqrh
RHSA-2023:4628 https://access.redhat.com/errata/RHSA-2023:4628
RHSA-2023:4629 https://access.redhat.com/errata/RHSA-2023:4629
RHSA-2023:5049 https://access.redhat.com/errata/RHSA-2023:5049
RHSA-2023:5050 https://access.redhat.com/errata/RHSA-2023:5050
RHSA-2023:6403 https://access.redhat.com/errata/RHSA-2023:6403
RHSA-2024:4504 https://access.redhat.com/errata/RHSA-2024:4504
USN-5942-1 https://usn.ubuntu.com/5942-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-27522.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/apache/httpd/commit/d753ea76b5972a85349b68c31b59d04c60014f2d
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/unbit/uwsgi
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/unbit/uwsgi/commit/58ee1df31fa9e9af106aaeabb82374c36b433822
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/unbit/uwsgi/commit/acb03530aaaeaa810f28a5b64da619525940f569
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://httpd.apache.org/security/vulnerabilities_24.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

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unchanged

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-23T16:41:55Z/ Found at https://httpd.apache.org/security/vulnerabilities_24.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://lists.debian.org/debian-lts-announce/2023/04/msg00028.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
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-23T16:41:55Z/ Found at https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-27522
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:N/I:H/A:N Found at https://security.gentoo.org/glsa/202309-01
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-23T16:41:55Z/ Found at https://security.gentoo.org/glsa/202309-01
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://uwsgi-docs.readthedocs.io/en/latest/Changelog-2.0.22.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

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none

required

unchanged

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Exploit Prediction Scoring System (EPSS)
Percentile 0.73651
EPSS Score 0.00781
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:36:23.502209+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2023-27522.json 38.0.0