CVE-2026-90970

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

State: Published
Severity: 9.9 Critical
Published: Oct 2, 2026
Updated: Oct 2, 2026
Reserved: Sep 14, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	GitLab

Weaknesses

CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine

Affected Products

Product	Versions
GitLab AI GatewayGitLab	18.1.6 to before 19.2.4Affected 19.3 to before 19.3.2Affected 19.4 to before 19.4.1Affected

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/628842

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