{"affected":[{"product":"ModSecurity","source":"CNA: GitHub_M","vendor":"owasp-modsecurity","versions":[{"status":"affected","version":">= 3.0.0, < 3.0.17"}]}],"cveId":"CVE-2026-73856","cwes":["CWE-178"],"description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 until 3.0.17, src/transaction.cc compares a response Content-Type value against SecResponseBodyMimeType entries case-sensitively. A mixed-case response media type that is semantically equivalent to a configured lowercase type can therefore be treated as unconfigured, causing ModSecurity to skip RESPONSE_BODY inspection. An unauthenticated requester can then receive response content that a phase 4 rule would otherwise block, including sensitive error or debug data. This issue is fixed in version 3.0.17.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.6,"severity":"high","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}],"modifiedAt":1793893809778,"publishedAt":1793893809778,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/owasp-modsecurity/ModSecurity/commit/23ccd9202114f8313df3773f7992782fd9949c98"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17"}],"remediation":[],"revision":"b62f5a81ed5e45d003c3f900991e3d34c183f8737e72430406547a5f5e081437","sources":[{"modifiedAt":1793893809778,"name":"CNA: GitHub_M","retrievedAt":1793895379862,"url":"https://www.cve.org/CVERecord?id=CVE-2026-73856"}],"ssvc":null,"status":"published","title":"ModSecurity: Response Body Inspection Bypass","updatedAt":1793895379862}