CVE-2025-61727
Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509
- State
- Published
- Severity
- 6.5 Medium
- Published
- Dec 3, 2025
- Updated
- Dec 3, 2025
- Reserved
- Sep 30, 2025
Description
An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | CISA-ADP |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
crypto/x509Go standard library |
|
References
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