{"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"}}}}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,4.4.0]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "LibreSSL", "source": "cna", "vendor": "OpenBSD"}, "product": "libressl", "vendor": "openbsd"}], "created": "2026-10-28T03:30:15.386732+00:00", "updated": "2026-10-28T03:45:13.515561+00:00", "vendors": ["openbsd", "openbsd$PRODUCT$libressl"]}