Vulnerability · Published May 27, 2026 · Assigned by GitLab

CVE-2026-4868Authorization Bypass Through User-Controlled Key in GitLab

High 8.2

In plain English

A high-severity authorization bypass via user-controlled key 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 37% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.4%top 62.8% 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 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that, under certain conditions, could have allowed an authenticated user to cause specific Duo AI workflows to run under another user's identity due to improper user identity resolution when triggering Duo AI workflow runners.

Affected products (as reported)

Vendor	Product	Versions
GitLab	GitLab	18.8 – before 18.10.718.11 – before 18.11.419.0 – before 19.0.1

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/594809
HackerOne Bug Bounty Report #3619872 technical-description, exploit, permissions-required
https://about.gitlab.com/releases/2026/05/27/patch-release-gitlab-19-0-1-released/