{"id":"CVE-2026-118372","published":"2026-10-28T03:17:13.607","lastModified":"2026-10-28T03:17:13.607","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.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","cwes":["CWE-93"],"vendors":[],"products":[],"references":[{"url":"https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txt","tags":[]},{"url":"https://github.com/libressl/portable","tags":[]},{"url":"https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L344","tags":[]},{"url":"https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/ocspcheck.c#L154","tags":[]},{"url":"https://github.com/openbsd/src/commit/3adb7688a5bcfb675fa6d8b10e242022d620a23d","tags":[]},{"url":"https://github.com/openbsd/src/commit/6efdc4cce3fac9fa7208a9452f84de34c5a68e9f","tags":[]},{"url":"https://www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-crlf-injection-via-aia-ocsp-url-path","tags":[]}],"exploitRefs":[{"url":"https://github.com/libressl/portable","tags":[]},{"url":"https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L344","tags":[]},{"url":"https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/ocspcheck.c#L154","tags":[]},{"url":"https://github.com/openbsd/src/commit/3adb7688a5bcfb675fa6d8b10e242022d620a23d","tags":[]},{"url":"https://github.com/openbsd/src/commit/6efdc4cce3fac9fa7208a9452f84de34c5a68e9f","tags":[]}],"hasPoc":true,"ai":null}