CVSS 3.1
5.9 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-27138
Medium (5.9) in golang go. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in stdlib 1.26.1.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-31)
- CWE
- CWE-295
- Published
- Modified
- Record from
- the NVD, synced
Affected
- golang:go
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GO-2026-4600 | Go | stdlib | >=1.26.0-0 <1.26.1 | 1.26.1 |