{"id":"CVE-2026-118768","title":"Botan: CLI utility `ocsp_check` accepts unauthenticated responses","summary":"Botan is a C++ cryptography library. From 1.11.34 until 3.13.0, the botan ocsp_check command requested an OCSP response from a certificate's Authority Information Access URL without verifying the response signature or authorizing the sig…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-347"],"vendor":"randombit","product":"botan","affected":["botan >= 1.11.34, < 3.13.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-03T16:06:39.020869Z"},"published":"2026-10-29","updated":"2026-11-03","sourceUpdated":"2026-11-03T16:06:50.034Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118768","references":[{"url":"https://github.com/randombit/botan/security/advisories/GHSA-mpr7-9494-4qcw","label":"https://github.com/randombit/botan/security/advisories/GHSA-mpr7-9494-4qcw"},{"url":"https://github.com/randombit/botan/pull/5825","label":"https://github.com/randombit/botan/pull/5825"},{"url":"https://github.com/randombit/botan/commit/46b2a9ca59b0797184fbf7537495bda6e61a1983","label":"https://github.com/randombit/botan/commit/46b2a9ca59b0797184fbf7537495bda6e61a1983"}],"tags":["cve.org"],"epss":0.0007,"epssPercentile":0.00035,"ingestedAt":"2026-11-01T22:02:40.986Z","slug":"CVE-2026-118768","body":"## Overview\n\nBotan is a C++ cryptography library. From 1.11.34 until 3.13.0, the botan ocsp_check command requested an OCSP response from a certificate's Authority Information Access URL without verifying the response signature or authorizing the signer. A malicious responder or on-path attacker could return a matching and timely GOOD response with an empty, invalid, or unauthorized signature, causing a revoked certificate to produce exit status 0 and OCSP check OK output. Only the command-line interface is affected. This issue is fixed in version 3.13.0.\n\n## Affected\n\n- `botan >= 1.11.34, < 3.13.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}