Vulnerability · Published Sep 29, 2026 · Assigned by GitLab

CVE-2026-8937Missing Authorization in GitLab

Medium 4.3

In plain English

A medium-severity missing authorization in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 86.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.0 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 to read private child issue contents, including titles and descriptions, from projects they had no access to, due to missing authorization checks on linked work items within visible epics.

Affected products (as reported)

Vendor	Product	Versions
GitLab	GitLab	19.0 – before 19.2.719.3 – before 19.3.319.4 – before 19.4.1

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/600533
HackerOne Bug Bounty Report #3702369 technical-description, exploit, permissions-required
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released/