GitLabCVE-2026-12664

GitLab: improper authorization

CVE-2026-12664 · Published Oct 22, 2026 · updated Oct 27, 2026

Medium6.8

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 18.2 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, could have allowed an authenticated user with a read_api-scoped token to retrieve a project's incoming email address and create work items, bypassing the token's restrictions, due to insufficient scope enforcement on a GraphQL field.

Affected versions

Package	Affected	Fixed in
GitLab Product	>= 18.2, < 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:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-863

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