High severity7.3NVD Advisory· Published Sep 20, 2022· Updated Jun 17, 2026
CVE-2022-39957
CVE-2022-39957
Description
The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass. A client can issue an HTTP Accept header field containing an optional "charset" parameter in order to receive the response in an encoded form. Depending on the "charset", this response can not be decoded by the web application firewall. A restricted resource, access to which would ordinarily be detected, may therefore bypass detection. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised to upgrade to 3.2.2 and 3.3.3 respectively.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:*:*:*:*:*:*:*:*range: >=3.0.0,<3.2.2
- (no CPE)range: 3.0.x, 3.1.x, 3.2.1, 3.3.2
- (no CPE)range: 3.0.x
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
7- coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/nvdPatchVendor Advisory
- lists.debian.org/debian-lts-announce/2023/01/msg00033.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/08/msg00004.htmlnvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HL2L2GF7GOCWPMJZDUE5OXDSXHGG3XUJ/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PD56EAYNGB6E6QQH62LAYCONOP6OH5DZ/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YPQ6CCMX3MU4A7MTCGQJA7VMJW3IQDXV/nvd
- security.gentoo.org/glsa/202305-25nvd
News mentions
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