{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118373","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-10-28T01:19:20.564Z","datePublished":"2026-10-28T02:03:21.525Z","dateUpdated":"2026-10-28T02:03:21.525Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-28T02:03:21.525Z"},"datePublic":"2026-10-16T00:00:00.000Z","title":"LibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Cleartext Transmission of Sensitive Information","cweId":"CWE-319","type":"CWE"}]}],"affected":[{"vendor":"OpenBSD","product":"LibreSSL","packageURL":"pkg:github/libressl/portable","repo":"https://github.com/libressl/portable","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"4.4.0"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:openbsd:libressl:*:*:*:*:*:*:*:*","versionEndIncluding":"4.4.0"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW"}}],"references":[{"url":"https://github.com/openbsd/src/commit/0f7039667044d1cd252cc72134e499186da4da25","tags":["patch"]},{"url":"https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L299","tags":["technical-description"]},{"url":"https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txt","tags":["release-notes"],"name":"LibreSSL 4.4.0 Release Notes"},{"url":"https://github.com/libressl/portable","tags":["product"]},{"name":"VulnCheck Advisory: LibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-cleartext-transmission-of-ocsp-requests-via-url2host"}],"credits":[{"lang":"en","value":"Aziz Elbelaychy (Ostorlab)","type":"finder"},{"lang":"en","value":"Kenjiro Nakayama","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}}}}