CVE-2025-61727 — MEDIUM (6.5)

Q: How severe is CVE-2025-61727?

CVE-2025-61727 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2025-61727?

Check the references section above for vendor advisories and patch information. Affected products include: Golang Go.

Vulnerability 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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Golang	Go	< 1.24.11

Related Weaknesses (CWE)

CWE-295

References

https://go.dev/cl/723900Patch
https://go.dev/issue/76442Issue Tracking
https://groups.google.com/g/golang-announce/c/8FJoBkPddm4Mailing ListRelease Notes
https://pkg.go.dev/vuln/GO-2025-4175Vendor Advisory

FAQ

What is CVE-2025-61727?

CVE-2025-61727 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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...

How severe is CVE-2025-61727?

CVE-2025-61727 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-61727?

Check the references section above for vendor advisories and patch information. Affected products include: Golang Go.