CVE-2025-61727
Last modified
CVE-2025-61727 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Golang | Go | < 1.24.11 |
| Golang | Go | >= 1.25, < 1.25.5 |
References
- https://go.dev/issue/76442Issue Tracking
- https://groups.google.com/g/golang-announce/c/8FJoBkPddm4Mailing List, Release Notes
- https://pkg.go.dev/vuln/GO-2025-4175Vendor 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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