{"id":"CVE-2026-32281","state":"PUBLISHED","title":"Inefficient policy validation in crypto/x509","description":"Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.","publishedAt":"2026-04-08T01:06:58.354Z","updatedAt":"2026-04-13T18:19:44.779Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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":"1.25.9","versionType":"semver"},{"version":"1.26.0-0","status":"affected","lessThan":"1.26.2","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"policiesValid"},{"name":"Certificate.Verify"}]}],"references":["https://go.dev/cl/758061","https://go.dev/issue/78281","https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU","https://pkg.go.dev/vuln/GO-2026-4946"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/32xxx/CVE-2026-32281.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-32281","state":"PUBLISHED","datePublished":"2026-04-08T01:06:58.354Z","dateUpdated":"2026-04-13T18:19:44.779Z","assignerShortName":"Go","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateReserved":"2026-03-11T16:38:46.556Z"},"containers":{"cna":{"title":"Inefficient policy validation in crypto/x509","descriptions":[{"lang":"en","value":"Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool."}],"affected":[{"vendor":"Go standard library","product":"crypto/x509","packageName":"crypto/x509","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.25.9","versionType":"semver"},{"version":"1.26.0-0","status":"affected","lessThan":"1.26.2","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"policiesValid"},{"name":"Certificate.Verify"}]}],"references":[{"url":"https://go.dev/cl/758061"},{"url":"https://go.dev/issue/78281"},{"url":"https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"},{"url":"https://pkg.go.dev/vuln/GO-2026-4946"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-407: Inefficient Algorithmic Complexity"}]}],"providerMetadata":{"shortName":"Go","orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateUpdated":"2026-04-08T01:06:58.354Z"},"credits":[{"lang":"en","value":"Jakub Ciolek - https://ciolek.dev"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-13T17:52:37.734298Z","id":"CVE-2026-32281","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":"2026-04-13T18:19:44.779Z"}}]}}}