{"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": "2026-03-08T05:56:20.771Z"}, "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"}]}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-27137", "lastModified": "2026-03-09T13:35:34.633", "metrics": {}, "published": "2026-03-06T22:16:00.850", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/752182"}, {"source": "security@golang.org", "url": "https://go.dev/issue/77952"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-4599"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Awaiting Analysis"}

{}