Medium severity5.9NVD Advisory· Published Oct 28, 2026
CVE-2026-118374
CVE-2026-118374
Description
LibreSSL ocspcheck through 4.4.0 contains a memory exhaustion vulnerability that allows malicious OCSP responders to exhaust memory by sending unbounded HTTP responses. Attackers controlling the responder or intercepting plain HTTP AIA OCSP traffic can stream endless headers or body data to http_head_read() and http_body_read(), denying certificate status checks.
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Affected products
1Patches
Vulnerability mechanics
References
5- ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txtnvd
- github.com/openbsd/src/blob/f6f428241d469cf434e60b73fc834d0448f068d5/usr.sbin/ocspcheck/http.cnvd
- github.com/openbsd/src/commit/bf5da63f53179ef423d18c56d6da89eaefb56228nvd
- github.com/openbsd/src/commit/de4274c56c9ace88232591d4c919d79281a8de59nvd
- www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-memory-exhaustion-via-unbounded-ocsp-http-responsenvd
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