{"id":"DEBIAN-CVE-2026-33810","details":"When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.","modified":"2026-09-19T22:47:29.907960332Z","published":"2026-04-08T02:16:03.950Z","upstream":["CVE-2026-33810"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-33810"}],"affected":[{"package":{"name":"golang-1.26","ecosystem":"Debian:14","purl":"pkg:deb/debian/golang-1.26?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.2-1"}]}],"versions":["1.26.0-1","1.26.1-1","1.26~rc2-1","1.26~rc3-1","1.26~rc3-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33810.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"}]}