GitLabCVE-2026-13319

GitLab: missing authorization

CVE-2026-13319 · Published Oct 22, 2026 · updated Oct 30, 2026

Medium4.3

Fix: upgrade to 19.3.6 or later (3 fixed versions below)

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, could have allowed an authenticated to read milestone metadata, including titles, descriptions, and full project paths, from arbitrary private projects across the instance without any project membership, due to missing authorization checks on a user-supplied project filter parameter in the group milestones API.

Affected versions

Package	Affected	Fixed in
GitLab Product	>= 15.10, < 19.3.6	19.3.6
	>= 19.4, < 19.4.3	19.4.3
	>= 19.5, < 19.5.1	19.5.1

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-639

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