{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27137","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","state":"PUBLISHED","assignerShortName":"Go","dateReserved":"2026-02-17T19:57:28.434Z","datePublished":"2026-03-06T21:28:13.748Z","dateUpdated":"2026-03-10T13:32:53.202Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","shortName":"Go","dateUpdated":"2026-03-08T05:56:20.771Z"},"title":"Incorrect enforcement of email constraints in crypto/x509","descriptions":[{"lang":"en","value":"When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered."}],"affected":[{"vendor":"Go standard library","product":"crypto/x509","collectionURL":"https://pkg.go.dev","packageName":"crypto/x509","versions":[{"version":"1.26.0-0","lessThan":"1.26.1","status":"affected","versionType":"semver"}],"programRoutines":[{"name":"newEmailConstraints"},{"name":"emailConstraints.query"},{"name":"checkConstraints"},{"name":"checkChainConstraints"},{"name":"parseMailboxes"},{"name":"Certificate.Verify"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-295: Improper Certificate Validation"}]}],"references":[{"url":"https://go.dev/cl/752182"},{"url":"https://go.dev/issue/77952"},{"url":"https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"},{"url":"https://pkg.go.dev/vuln/GO-2026-4599"}],"credits":[{"lang":"en","value":"Jakub Ciolek"}]},"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:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-03-10T13:32:09.097820Z","id":"CVE-2026-27137","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":"2026-03-10T13:32:53.202Z"}}]}}