CVE-2026-27138
Last modified
CVE-2026-27138 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Golang | Go | 1.26.0 |
References
- https://go.dev/cl/752183Mailing List
- https://go.dev/issue/77953Issue Tracking
- https://pkg.go.dev/vuln/GO-2026-4600Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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