In short
- CVE-2026-27138 is a MEDIUM (CVSS 5.9) vulnerability affecting stdlib, go (golang).
- Chance of exploitation in the next 30 days (EPSS): 0.38%, higher than 32.2% of all vulnerabilities.
- Fix: update to 1.26.1 or later.
| Package | Affected versions | Patched versions |
|---|
| stdlib Go | ≥ 1.26.0-0, < 1.26.1
| 1.26.1
|
| go | = 1.26.0
| No fix yet |
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.
NVD 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.
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