CVE-2026-19889
Received Received - Intake

Authentication Bypass in GitLab AI Gateway

Publication date: 2026-08-27

Last updated on: 2026-08-27

Assigner: GitLab Inc.

Description
GitLab has remediated a vulnerability in the GitLab AI Gateway component affecting all versions of the AI Gateway from 18.9.0 to 19.0.12, 19.1 to 19.1.7, and 19.2 to 19.2.2 that could have allowed an authenticated user with Duo Agent Platform access to redirect model requests to an externally-controlled endpoint via crafted model metadata, resulting in the disclosure of Google Vertex AI or AWS Bedrock cloud service credentials.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-27
Last Modified
2026-08-27
Generated
2026-08-27
AI Q&A
2026-08-27
EPSS Evaluated
N/A
NVD
CVE-2026-19889
EUVD
EUVD-2026-67087

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
gitlab ai_gateway From 18.9.0 (inc) to 19.0.12 (inc)
gitlab ai_gateway From 19.1 (inc) to 19.1.7 (inc)
gitlab ai_gateway From 19.2 (inc) to 19.2.2 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability in GitLab's AI Gateway allows an authenticated user with Duo Agent Platform access to redirect model requests to an external endpoint by manipulating model metadata. This could lead to the exposure of cloud service credentials for Google Vertex AI or AWS Bedrock.

Impact Analysis

If exploited, this vulnerability could result in unauthorized access to cloud service credentials, potentially leading to data breaches, service disruptions, or unauthorized use of cloud resources.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations must address this to maintain regulatory compliance.

Mitigation Strategies

Upgrade GitLab AI Gateway to a patched version (19.0.13 or later, 19.1.8 or later, or 19.2.3 or later) to address the vulnerability in the AI Gateway component.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-19889. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart