Back to search
CVE-2026-33810
Published: Apr 8, 2026
Modified: Apr 20, 2026
PUBLISHED
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Go standard library | crypto/x509 | affected 1.26.0-0 - < 1.26.2 |
Security Training
Train your team to recognize and prevent security threats with our comprehensive security awareness program.
Start TrainingVulnerability Scanning
Discover vulnerabilities in your applications and infrastructure before attackers do.
Scan Now