Low severity3.7NVD Advisory· Published Oct 28, 2026
CVE-2026-118372
CVE-2026-118372
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.
Affected products
1Patches
Vulnerability mechanics
References
6- ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txtnvd
- github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.cnvd
- github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/ocspcheck.cnvd
- github.com/openbsd/src/commit/3adb7688a5bcfb675fa6d8b10e242022d620a23dnvd
- github.com/openbsd/src/commit/6efdc4cce3fac9fa7208a9452f84de34c5a68e9fnvd
- www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-crlf-injection-via-aia-ocsp-url-pathnvd
News mentions
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