CVE-2026-6515: Insufficient Session Expiration in GitLab

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-22 · updated 2026-06-17
Weakness: CWE-613

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1 that could have allowed a user to use invalidated or incorrectly scoped credentials to access Virtual Registries under certain conditions.

Affected products

GitLab: from 18.2.0 before 18.9.6; from 18.10.0 before 18.10.4; 18.11.0 — fixed in 18.10.4, 18.9.6

How to fix

Upgrade to a fixed version: GitLab 18.10.4, 18.9.6. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/595993

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