{"id":"CVE-2026-27137","revision":"0786c4d0baad492bac9f0c1417742c25","records":[{"revision":"0786c4d0baad492bac9f0c1417742c25","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-27137","aliases":[],"title":"Incorrect enforcement of email constraints in crypto/x509","description":"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.","state":0,"publishedAt":"2026-03-06T21:28:13.748+00:00","modifiedAt":"2026-09-18T12:04:42.431+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"crypto/x509","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"crypto/x509\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"crypto/x509\",\n                    \"versions\": [\n                        {\n                            \"version\": \"1.26.0-0\",\n                            \"lessThan\": \"1.26.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"newEmailConstraints\"\n                        },\n                        {\n                            \"name\": \"emailConstraints.query\"\n                        },\n                        {\n                            \"name\": \"checkConstraints\"\n                        },\n                        {\n                            \"name\": \"checkChainConstraints\"\n                        },\n                        {\n                            \"name\": \"parseMailboxes\"\n                        },\n                        {\n                            \"name\": \"Certificate.Verify\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["https://go.dev/cl/752182","https://go.dev/issue/77952","https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk","https://pkg.go.dev/vuln/GO-2026-4599"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-27137","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-27137","identifiers":["CVE-2026-27137"]},"retained":false,"historicalAffected":[]}],"coverage":[]}