CVE-2025-61727
December 03, 2025
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.
Affected Packages
https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1.25.0 <go1.25.5Fix Suggestion:
Update to version go1.25.5https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1 <go1.24.11Fix Suggestion:
Update to version go1.24.11github.com/golang/go (GO):
Affected version(s) >=go1 <go1.24.11Fix Suggestion:
Update to version go1.24.11Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Certificate Validation
EPSS
Base Score:
0.01
