{"id":"CVE-2026-118372","aliases":[],"title":"LibreSSL ocspcheck through 4.4.0 CRLF Injection via AIA OCSP URL Path","titleSource":"VulnCheck","descriptionSource":"VulnCheck","products":[{"vendor":"OpenBSD","name":"LibreSSL","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.4.0","versionType":"semver"}],"defaultStatus":"unaffected","source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-118372"}],"remediation":[],"description":"LibreSSL ocspcheck through 4.4.0 contains a CRLF injection vulnerability that allows attackers to inject HTTP headers by embedding CR/LF sequences in a certificate's AIA OCSP URI path. Because url2host() copies the path without rejecting control characters and http_open() places it in the POST request line, attackers can inject headers or split OCSP requests sent to the responder host.","severity":"medium","score":6.3,"published":"2026-10-28T02:03:20.849Z","modified":"2026-10-28T16:11:41.029Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/openbsd/src/commit/6efdc4cce3fac9fa7208a9452f84de34c5a68e9f","https://github.com/openbsd/src/commit/3adb7688a5bcfb675fa6d8b10e242022d620a23d","https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L344","https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/ocspcheck.c#L154","https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txt","https://github.com/libressl/portable","https://www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-crlf-injection-via-aia-ocsp-url-path"],"sources":[{"name":"CVE","id":"CVE-2026-118372","modified":"2026-10-28T16:11:41.029Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-118372"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T04:15:31.644Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}