Vulnerability · Published Aug 12, 2026 · Assigned by GitLab

CVE-2026-6821Missing 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 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 70.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

GitLab has remediated an issue in GitLab EE affecting all versions from 12.0 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user to bypass IP-based access restrictions and read limited merge request information from a private project due to missing authorization checks in a merge requests API endpoint.

Affected products (as reported)

Vendor	Product	Versions
GitLab	GitLab	12.0 – before 19.0.619.1 – before 19.1.419.2 – before 19.2.2

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/597702
HackerOne Bug Bounty Report #3674254 technical-description, exploit, permissions-required
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-2-released/