CVE-2026-90970: CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine in GitLab GitLab AI Gateway
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.
CVE-2026-90970: CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine in GitLab GitLab AI Gateway
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.
CVSS v3.1
Score 9.9critical
Affected software
GitLab
GitLab AI Gateway
cpe:2.3:a:gitlab:ai-gateway:*:*:*:*:*:*:*:*Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-09-14T13:37:05.263Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abfc3daa43b0b3b89c80414
Added to database: 10/02/2026, 14:46:50 UTC
Last updated: 10/02/2026, 14:46:50 UTC
Views: 1
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