CVE-2026-84284

Incorrect Authorization in GitLab

GitLab GitLabApplications & CMS

CVSS

5.3Medium

ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV

Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 12% of CVEs. Scored 23 Oct 2026FIRST EPSS

Fixed in19.2.8Also 19.3.6, 19.4.2CVE List

Published13 Oct 2026Updated 22 Oct 2026CVE List

What fixes it

19.2.8GitLabCVE List
19.3.6GitLabCVE List
19.4.2GitLabCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

GitLab Critical Patch Release: 19.4.2, 19.3.5, 19.2.8GitLab releases, 12 Oct 2026

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.11 before 19.2.8, 19.3 before 19.3.6, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an unauthenticated user to read work item contents from private groups and projects due to incorrect authorization checks.

Text from CVE List

Affected versions 3

GitLabaffected: 17.11 before 19.2.8CVE List
GitLabaffected: 19.3 before 19.3.6CVE List
GitLabaffected: 19.4 before 19.4.2CVE List