CVE-2023-6680
Improper Certificate Validation in GitLab
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
7th
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.
| CWE | CWE-295 |
| Vendor | gitlab |
| Product | gitlab |
| Ecosystems | |
| Industries | Technology |
| Published | Dec 15, 2023 |
| Last Updated | Apr 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
GitLab / GitLab
11.6 < 16.4.4 16.5 < 16.5.4 16.6 < 16.6.2
References
Credits
Thanks Lucas Serrano from PEReN (@LSerranoPEReN) for reporting this vulnerability