{"id":"CVE-2026-118373","aliases":[],"title":"LibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()","titleSource":"VulnCheck","descriptionSource":"VulnCheck","products":[{"vendor":"OpenBSD","name":"LibreSSL","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.4.0","versionType":"semver"}],"defaultStatus":"unaffected","source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-118373"}],"remediation":[],"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nonces.","severity":"medium","score":6.3,"published":"2026-10-28T02:03:21.525Z","modified":"2026-10-28T02:03:21.525Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/openbsd/src/commit/0f7039667044d1cd252cc72134e499186da4da25","https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L299","https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txt","https://github.com/libressl/portable","https://www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-cleartext-transmission-of-ocsp-requests-via-url2host"],"sources":[{"name":"CVE","id":"CVE-2026-118373","modified":"2026-10-28T02:03:21.525Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-118373"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T21:40:30.742Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}