CVE-2026-90970

Improper Neutralization of Special Elements Used in a Template Engine in GitLab AI Gateway

Published Oct 2, 2026 CVSS 3.1 · 9.9 Critical EPSS 17.5% KEV · Not listed
Description
GitLab has remediated a vulnerability in the GitLab AI Gateway component affecting all versions of the AI Gateway from 18.1.6 before 19.2.4, 19.3 before 19.3.2, and 19.4 before 19.4.1 that, under certain conditions, could have allowed an authenticated user with Duo Agent Platform access to escape the prompt template sandbox via a specially crafted flow configuration, resulting in arbitrary command execution on the AI Gateway.

Remediation

Vendor Solution

Upgrade to version 19.2.4, 19.3.2, 19.4.1 or above.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description GitLab has remediated a vulnerability in the GitLab AI Gateway component affecting all versions of the AI Gateway from 18.1.6 before 19.2.4, 19.3 before 19.3.2, and 19.4 before 19.4.1 that, under certain conditions, could have allowed an authenticated user with Duo Agent Platform access to escape the prompt template sandbox via a specially crafted flow configuration, resulting in arbitrary command execution on the AI Gateway.
Title Improper Neutralization of Special Elements Used in a Template Engine in GitLab AI Gateway
First Time appeared Gitlab
Gitlab ai-gateway
Weaknesses CWE-1336
CPEs cpe:2.3:a:gitlab:ai-gateway:*:*:*:*:*:*:*:*
Vendors & Products Gitlab
Gitlab ai-gateway
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitLab
Published
Updated
Oct 2, 2026, 4:48 PM
Reserved
Sep 14, 2026, 1:37 PM
Status
Awaiting Analysis
Published
Oct 2, 2026, 3:17 PM
Modified
Oct 2, 2026, 6:44 PM