{"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":"2026-07-28T03:55:52.090715027Z","published":"2026-03-06T21:28:13.748Z","related":["ALSA-2026:19022","ALSA-2026:19181","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-2026:10909-1","openSUSE-SU-2026:20342-1","openSUSE-SU-2026:20537-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"1.26.0-0"},{"fixed":"1.26.1"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"Go","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":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27137.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10125"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10158"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10169"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10175"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10184"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10225"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10250"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10929"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11800"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:13545"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:14879"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19022"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19049"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19132"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19181"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19375"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:21769"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22347"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22423"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22450"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22714"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22862"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22937"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:23228"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:23345"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26568"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26585"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:28038"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:28047"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29854"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:39810"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41019"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41928"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:5110"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:5549"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:7291"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8151"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8167"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8337"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8338"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8842"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:9052"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:9385"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:9697"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:9698"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:9699"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:9872"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-27137"},{"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"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2445345"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/golang/go","events":[{"introduced":"d90b98e65320778f3b1f99a6951ab20f04d218b3"},{"last_affected":"d90b98e65320778f3b1f99a6951ab20f04d218b3"}],"database_specific":{"source":"CPE_STRING","cpe":"cpe:2.3:a:golang:go:1.26.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.26.0"},{"last_affected":"1.26.0"}]}}],"versions":["1.26.0","go1.26.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27137.json"}}],"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"}]}