{"schema":"threatline.record/2","record":{"id":"CVE-2026-118373","aliases":[],"summary":"LibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()","details":"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.","categories":["Operating systems"],"product":"LibreSSL","vendor":"OpenBSD","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-118373","source_modified_at":"2026-10-28T02:03:21.525Z","fetched_at":"2026-10-28T08:18:35.509402Z","product":"LibreSSL","vendor":"OpenBSD","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"4.4.0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":6.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T02:03:21.525Z","modified_at":"2026-10-28T02:03:21.525Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-118373","fetched_at":"2026-10-28T08:18:35.509402Z","source_modified_at":"2026-10-28T02:03:21.525Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/openbsd/src/commit/0f7039667044d1cd252cc72134e499186da4da25","tags":["patch"]},{"source":"CVE List","url":"https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L299","tags":["technical-description"]},{"source":"CVE List","url":"https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txt","tags":["release-notes"]},{"source":"CVE List","url":"https://github.com/libressl/portable","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-cleartext-transmission-of-ocsp-requests-via-url2host","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-28T02:03:21.525Z","content_hash":"6ef0bde9e97b7bee02988ce7a9f878708d050a46092a9439316ee5de524a93c7"}}