{"id":"CVE-2026-73856","aliases":[],"cve":{"records":[{"id":"CVE-2026-73856","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-08-13T17:44:28.645Z","published":"2026-11-05T15:50:09.778Z","modified":"2026-11-09T22:12:13.373Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-11-05T15:50:09.778Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-09T22:12:13.373Z"}],"references":[{"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/owasp-modsecurity/ModSecurity/commit/23ccd9202114f8313df3773f7992782fd9949c98","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-178","description":"CWE-178: Improper Handling of Case Sensitivity","source":"GitHub_M"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-09T22:11:44.794859Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"ModSecurity: Response Body Inspection Bypass","titleSource":"GitHub_M","descriptionSource":"GitHub_M","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3.0.17.","score":8.6,"severity":"high","published":"2026-11-05T15:50:09.778Z","modified":"2026-11-09T22:12:13.373Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"owasp-modsecurity","name":"ModSecurity","platforms":[],"versions":[{"version":">= 3.0.0, < 3.0.17","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-73856"}],"remediation":[],"references":["https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw","https://github.com/owasp-modsecurity/ModSecurity/commit/23ccd9202114f8313df3773f7992782fd9949c98","https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17"],"sources":[{"name":"CVE","id":"CVE-2026-73856","modified":"2026-11-09T22:12:13.373Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-73856"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6}],"sourceAffected":[],"observedAt":"2026-11-09T22:21:23.472Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T03:20:35.359Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-05T17:10:34.078Z","attemptedAt":"2026-11-05T17:10:34.078Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-05T17:10:34.316Z","attemptedAt":"2026-11-05T17:10:34.316Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-05T17:10:34.818Z","attemptedAt":"2026-11-05T17:10:34.818Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-05T17:10:34.112Z","attemptedAt":"2026-11-05T17:10:34.112Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-73856","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73856","modified":"2026-11-05T16:17:48.443","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","checkedAt":"2026-11-05T17:10:34.078Z"},{"source":"ENISA EUVD","id":"EUVD-2026-117554","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-117554","modified":"Nov 5, 2026, 3:50:09 PM","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","checkedAt":"2026-11-05T17:10:34.818Z"}],"aiSummary":{"text":"ModSecurity, a web application firewall, has a vulnerability in versions 3.0.0 to 3.0.17 where it skips response body inspection due to case-sensitive comparison of response Content-Type. An unauthenticated attacker can receive sensitive data. This issue is fixed in version 3.0.17.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-05T16:36:03.686Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-73856"}]}}