CVE-2023-6680

Improper Certificate Validation in GitLab

HIGH
8.1
CVSS Score
Published: December 15, 2023 at 04:02 PM UTC
Updated: June 17, 2026 at 06:51 AM UTC
1 product affected across 1 vendorGitLab

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Severity
HIGH8.1
Exploit prediction
EPSS 0.4%

Description

An improper certificate validation issue in Smartcard authentication in GitLab EE affecting all versions from 11.6 prior to 16.4.4, 16.5 prior to 16.5.4, and 16.6 prior to 16.6.2 allows an attacker to authenticate as another user given their public key if they use Smartcard authentication. Smartcard authentication is an experimental feature and has to be manually enabled by an administrator.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

11.6 ≤ v < 16.4.416.5 ≤ v < 16.5.416.6 ≤ v < 16.6.211.616.516.6
Affected range stops below 16.4.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.5.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.6.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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