CVE-2026-27138
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Go standard library | crypto/x509 | 1.26.0-0 < 1.26.1 | affected |
Weaknesses
- CWE-1285: Improper Validation of Specified Index, Position, or Offset in Input
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
- https://go.dev/issue/77953
- https://go.dev/cl/752183
- https://pkg.go.dev/vuln/GO-2026-4600
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.