OpenBSD

CVE-2026-118373: LibreSSL ocspcheck through 4.4.0 contains a cleartext transmission vulnerability because url2host() discards the OCSP URL scheme and http_alloc() only selects T

CVE-2026-118373 Oct 28, 2026 Source: Vendor

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.

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-118373

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Credited

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CVE-2026-118373 BR2026-0000-036486 unclaimed

Credited as Aziz Elbelaychy (Ostorlab)