{"id":"CVE-2026-27137","summary":"Incorrect enforcement of email constraints in crypto/x509","details":"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.","aliases":["BIT-golang-2026-27137","GO-2026-4599"],"modified":"2026-05-15T04:14:30.823059593Z","published":"2026-03-06T21:28:13.748Z","related":["ALSA-2026:8842","CGA-rq3j-hw6w-7wc2","SUSE-SU-2026:0876-1","SUSE-SU-2026:0976-1","SUSE-SU-2026:0993-1","SUSE-SU-2026:1042-1","SUSE-SU-2026:21195-1","openSUSE-SU-2026:10299-1","openSUSE-SU-2026:20342-1","openSUSE-SU-2026:20537-1"],"database_specific":{"cna_assigner":"Go","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.26.0-0"},{"fixed":"1.26.1"}]}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27137.json"},"references":[{"type":"WEB","url":"https://go.dev/cl/752182"},{"type":"WEB","url":"https://go.dev/issue/77952"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"},{"type":"WEB","url":"https://pkg.go.dev"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-4599"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27137.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27137"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}