CVE-2026-4868
Authentication Bypass in GitLab Duo AI Workflows
Publication date: 2026-05-27
Last updated on: 2026-05-27
Assigner: GitLab Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gitlab | gitlab | From 18.11.0 (inc) to 18.11.4 (exc) |
| gitlab | gitlab | From 18.8.0 (inc) to 18.10.7 (exc) |
| gitlab | gitlab | 19.0.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-639 | The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in GitLab Enterprise Edition affects certain versions before specific patch releases. It allows an authenticated user, under certain conditions, to trigger Duo AI workflows that run under another user's identity. This happens due to improper user identity resolution when triggering these workflow runners.
How can this vulnerability impact me? :
The vulnerability can lead to unauthorized actions being performed under another user's identity within GitLab. This can result in compromised integrity and confidentiality of workflows, potentially allowing an attacker to execute actions or access data they should not have permission for.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade GitLab EE to a fixed version. Specifically, update to version 18.10.7 or later if you are on the 18.8 to 18.10 series, 18.11.4 or later if you are on the 18.11 series, or 19.0.1 or later if you are on the 19.0 series.