{"id":"GO-2026-4599","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","CVE-2026-27137"],"modified":"2026-09-16T10:41:36.393085964Z","published":"2026-03-06T21:03:42Z","related":["RHSA-2026:10169","RHSA-2026:10929","RHSA-2026:19022","RHSA-2026:19049","RHSA-2026:19132","RHSA-2026:19181","RHSA-2026:22450","RHSA-2026:22714","RHSA-2026:22937","RHSA-2026:23228","RHSA-2026:28038","RHSA-2026:28047","RHSA-2026:36796","RHSA-2026:39810","RHSA-2026:41019","RHSA-2026:49702","RHSA-2026:49703","RHSA-2026:49712","RHSA-2026:54757","RHSA-2026:56143","RHSA-2026:56223","RHSA-2026:57649","RHSA-2026:61253","RHSA-2026:67159","RHSA-2026:67160","RHSA-2026:67517","RHSA-2026:67518","RHSA-2026:7291","RHSA-2026:8842"],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4599","review_status":"REVIEWED"},"references":[{"type":"FIX","url":"https://go.dev/cl/752182"},{"type":"REPORT","url":"https://go.dev/issue/77952"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"}],"affected":[{"package":{"name":"stdlib","ecosystem":"Go","purl":"pkg:golang/stdlib"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.26.0-0"},{"fixed":"1.26.1"}]}],"ecosystem_specific":{"imports":[{"path":"crypto/x509","symbols":["Certificate.Verify","checkChainConstraints","checkConstraints","emailConstraints.query","newEmailConstraints","parseMailboxes"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4599.json"}}],"schema_version":"1.7.3","credits":[{"name":"Jakub Ciolek"}]}