Skip to content
CVE PROGRAM SOURCE RECORD5.9 Medium

CVE-2026-27138

Panic in name constraint checking for malformed certificates in crypto/x509

Description

Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Go standard library crypto/x509

Default version status: unaffected

  • 1.26.0-0 to < 1.26.1affected

References