CVE-2026-104259

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{"affected": [{"affectedData": [{"product": "ModSecurity", "vendor": "owasp-modsecurity", "versions": [{"status": "affected", "version": "< 2.9.15"}, {"status": "affected", "version": ">= 3.0.0, < 3.0.17"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 2.9.15 and 3.0.17, msre_fn_removeComments_execute in apache2/re_tfns.c and inplace() in src/actions/transformations/remove_comments.cc implement t:removeComments by copying the character immediately after a comment terminator without re-evaluating it. Adjacent comments can therefore leave a later comment in the transformed value, allowing inline-comment obfuscation to bypass rules that depend on comment stripping. When a comment terminator is the final content, the same copy reads one byte beyond the input buffer. This issue is fixed in versions 2.9.15 and 3.0.17."}], "id": "CVE-2026-104259", "lastModified": "2026-11-12T22:18:51.470", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-104259", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-10T18:18:32.704323Z", "version": "2.0.3"}}]}, "published": "2026-11-09T22:18:22.160", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/owasp-modsecurity/ModSecurity/commit/264f348ae1823cb71cead3650b74c165678a1d46"}, {"source": "security-advisories@github.com", "url": "https://github.com/owasp-modsecurity/ModSecurity/commit/49a65f471d3130b91f7fff9bfac9fe8dd9b97c44"}, {"source": "security-advisories@github.com", "url": "https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v2.9.15"}, {"source": "security-advisories@github.com", "url": "https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17"}, {"source": "security-advisories@github.com", "url": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qrch-pjfr-9g47"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-670"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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