CVE-2026-10518: Incorrect Authorization in GitLab

Severity: medium (CVSS 4.3 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: 2026-09-29 · updated 2026-10-05
Weakness: CWE-863

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 17.9 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user with guest-level permissions to read private security policy content they were not authorized to access due to improper authorization enforcement.

Affected products

GitLab: from 17.9.0 before 19.2.7; from 19.3.0 before 19.3.3; 19.4.0 — fixed in 19.2.7, 19.3.3

How to fix

Upgrade to a fixed version: GitLab 19.2.7, 19.3.3. Check the vendor advisory for mitigations.

References

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/601723
https://hackerone.com/reports/3686230

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