CVE-2026-27138 — Panic in name constraint checking for malformed certificates in crypto/x509
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 progr…
Published: 2026-03-06 · CVSS: 5.9 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7