{"id":"CVE-2025-61727","state":"PUBLISHED","title":"Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509","description":"An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.","publishedAt":"2025-12-03T19:37:15.054Z","updatedAt":"2025-12-03T22:06:17.007Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","source":"CISA-ADP"},"assigner":"Go","products":["Go standard library crypto/x509"],"affected":[{"vendor":"Go standard library","product":"crypto/x509","packageName":"crypto/x509","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.24.11","versionType":"semver"},{"version":"1.25.0","status":"affected","lessThan":"1.25.5","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"Certificate.Verify"}]}],"references":["https://go.dev/cl/723900","https://go.dev/issue/76442","https://groups.google.com/g/golang-announce/c/8FJoBkPddm4","https://pkg.go.dev/vuln/GO-2025-4175"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:48.677Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/61xxx/CVE-2025-61727.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-61727","state":"PUBLISHED","datePublished":"2025-12-03T19:37:15.054Z","dateUpdated":"2025-12-03T22:06:17.007Z","assignerShortName":"Go","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateReserved":"2025-09-30T15:05:03.605Z"},"containers":{"cna":{"title":"Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509","descriptions":[{"lang":"en","value":"An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com."}],"affected":[{"vendor":"Go standard library","product":"crypto/x509","packageName":"crypto/x509","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.24.11","versionType":"semver"},{"version":"1.25.0","status":"affected","lessThan":"1.25.5","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"Certificate.Verify"}]}],"references":[{"url":"https://go.dev/cl/723900"},{"url":"https://go.dev/issue/76442"},{"url":"https://groups.google.com/g/golang-announce/c/8FJoBkPddm4"},{"url":"https://pkg.go.dev/vuln/GO-2025-4175"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-295: Improper Certificate Validation"}]}],"providerMetadata":{"shortName":"Go","orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateUpdated":"2025-12-03T19:37:15.054Z"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-12-03T22:06:13.958433Z","id":"CVE-2025-61727","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-03T22:06:17.007Z"}}]}}}