Denial of Service Vulnerability in GitLab CE/EE by GitLab
CVE-2026-1102

5.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
22 January 2026

What is CVE-2026-1102?

An issue has been identified in GitLab CE/EE that allows unauthenticated users to potentially create a denial of service condition. This is achieved by sending repeated malformed SSH authentication requests, which can overload the system and disrupt its normal operations. The affected versions include all releases from version 12.3 up to, but not including, 18.6.4, 18.7 prior to 18.7.2, and versions 18.8 prior to 18.8.2. Users of these affected versions are encouraged to apply the latest patches to mitigate this issue.

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Deploy the Patch

Affected Version(s)

GitLab 12.3 < 18.6.4

GitLab 18.7 < 18.7.2

GitLab 18.8 < 18.8.2

References

https://gitlab.com/gitlab-org/gitlab/-/issues/579746
issue-trackingpermissions-required
https://about.gitlab.com/releases/2026/01/21/patch-releas...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability has been discovered internally by GitLab team member [Thiago FigueirĂł](https://gitlab.com/thiagocsf)
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