Low severity3.7NVD Advisory· Published Oct 28, 2026
CVE-2026-118373
CVE-2026-118373
Description
LibreSSL ocspcheck through 4.4.0 contains a cleartext transmission vulnerability because url2host() discards the OCSP URL scheme and http_alloc() only selects TLS for port 443. On-path network attackers can read OCSP requests sent to https responder URLs on non-443 ports, exposing certificate serial numbers, issuer hashes, and nonces.
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Affected products
1Patches
Vulnerability mechanics
References
4- 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/commit/0f7039667044d1cd252cc72134e499186da4da25nvd
- www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-cleartext-transmission-of-ocsp-requests-via-url2hostnvd
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