{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33810","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","state":"PUBLISHED","assignerShortName":"Go","dateReserved":"2026-03-23T20:35:32.814Z","datePublished":"2026-04-08T01:06:56.546Z","dateUpdated":"2026-04-20T17:23:21.823Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","shortName":"Go","dateUpdated":"2026-04-08T01:06:56.546Z"},"title":"Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509","descriptions":[{"lang":"en","value":"When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. 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","collectionURL":"https://pkg.go.dev","packageName":"crypto/x509","versions":[{"version":"1.26.0-0","lessThan":"1.26.2","status":"affected","versionType":"semver"}],"programRoutines":[{"name":"newDNSConstraints"},{"name":"dnsConstraints.query"},{"name":"Certificate.Verify"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-295: Improper Certificate Validation"}]}],"references":[{"url":"https://go.dev/cl/763763"},{"url":"https://go.dev/issue/78332"},{"url":"https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"},{"url":"https://pkg.go.dev/vuln/GO-2026-4866"}],"credits":[{"lang":"en","value":"Riyas from Saintgits College of Engineering"},{"lang":"en","value":"k1rnt"},{"lang":"en","value":"@1seal"}]},"adp":[{"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:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-13T17:48:57.879958Z","id":"CVE-2026-33810","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-13T18:20:37.411Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/04/19/4"},{"url":"http://www.openwall.com/lists/oss-security/2026/04/20/1"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-04-20T17:23:21.823Z"}}]}}