CVE-2025-61727
Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509
6.5
MEDIUM
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2025-61727
To remediate CVE-2025-61727, upgrade the affected package to a fixed version below.
- —upgrade to 1.24.11 or later
- —no fix listed
- —no fix listed
- —no fix listed
- —upgrade to 1.25.6-1 or later
- —upgrade to 1.24.11 or later
Is CVE-2025-61727 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 1.24.11, >= 1.25.0, < 1.25.5
- from 0
- from 0
- from 0
- from 0, < 1.25.6-1
- from 0, < 1.24.11, >= 1.25.0, < 1.25.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |