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.

Code

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No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Mar 6, 2026 · NIST NVD

   Detected

   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.

2. Jun 17, 2026 · NIST NVD

   Updated

   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

• cpe golang/go1.26.0

Sources

• CVE.orgVulnerability recordCVE-2026-27138

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-27138

  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.

  nvd.nist.gov

References

• Mailing List · go.dev
• Issue Tracking · go.dev
• Release Notes · groups.google.com
• Vendor Advisory · pkg.go.dev