CVE-2026-111943
Published:October 20, 2026
Updated:October 20, 2026
crypto/x509: Verify (and the macOS/Windows platform verifiers) returned certificate chains through a set of intermediate CA certificates that Go now distrusts due to security concerns around their operation. Go 1.26.10 and 1.27.3 filter out any chain containing these intermediates, identified by SHA-256 SPKI hash.
Affected Packages
https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1 <go1.26.10Fix Suggestion:
Update to version go1.26.10https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1.27.0 <go1.27.3Fix Suggestion:
Update to version go1.27.3github.com/golang/go (GO):
Affected version(s) >=go1.27.0 <go1.27.3Fix Suggestion:
Update to version go1.27.3github.com/golang/go (GO):
Affected version(s) >=go1 <go1.26.10Fix Suggestion:
Update to version go1.26.10Related Resources (2)
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Contact UsCVSS v4
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Certificate Validation