CVE-2026-33810

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.

Score
CVSS 3.1 8.8 High
Status
Modified - security@golang.org
Published
2026-04-08
Last modified
2026-09-18
Weaknesses
CWE-1289, CWE-295

Affected products

References

 
 
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