CVE-2026-27138
March 06, 2026
Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS.
Affected Packages
https://github.com/golang/go.git (GITHUB):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1https://github.com/golang/go.git (GITHUB):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1https://github.com/golang/go.git (GITHUB):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1https://github.com/golang/go.git (GITHUB):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1https://github.com/golang/go.git (GITHUB):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1github.com/golang/go (GO):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1github.com/golang/go (GO):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1github.com/golang/go (GO):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1github.com/golang/go (GO):
Affected version(s) =go1.26.0 <go1.26.1Fix Suggestion:
Update to version go1.26.1Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
EPSS
Base Score:
0.02
