{"id":"CVE-2026-61813","title":"ModSecurity: Incorrect libcurl TLS hostname verification setting in HttpsClient::download","summary":"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, the HttpsClient::download function in src/utils/https_client.cc sets libcurl CURLOPT_SSL_VERIFYHOS…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","cvssSource":"cna","cwe":["CWE-295"],"vendor":"owasp-modsecurity","product":"ModSecurity","affected":["ModSecurity < 2.9.15","ModSecurity >= 3.0.0, < 3.0.17"],"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T15:48:15.062Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61813","references":[{"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-2vqc-36qp-ccmw","label":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-2vqc-36qp-ccmw"},{"url":"https://github.com/owasp-modsecurity/ModSecurity/commit/cce204806430e4848327aadeb9113e654631a0c1","label":"https://github.com/owasp-modsecurity/ModSecurity/commit/cce204806430e4848327aadeb9113e654631a0c1"},{"url":"https://github.com/owasp-modsecurity/ModSecurity/commit/edca70d853bfb725325137fa40d178beebc324fc","label":"https://github.com/owasp-modsecurity/ModSecurity/commit/edca70d853bfb725325137fa40d178beebc324fc"},{"url":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v2.9.15","label":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v2.9.15"},{"url":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17","label":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.920Z","epss":0.00155,"epssPercentile":0.04619,"slug":"CVE-2026-61813","body":"## Overview\n\nModSecurity 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, the HttpsClient::download function in src/utils/https_client.cc sets libcurl CURLOPT_SSL_VERIFYHOST to 1 instead of the strict value 2L. Under adversary-in-the-middle and TLS interception conditions, this non-strict setting may weaken TLS peer identity validation and increase the risk of accepting a certificate for an unintended host. End-to-end exploitation is non-trivial in typical environments. This issue is fixed in versions 2.9.15 and 3.0.17.\n\n## Affected\n\n- `ModSecurity < 2.9.15`\n- `ModSecurity >= 3.0.0, < 3.0.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}