CVE-2026-90970
Improper Neutralization of Special Elements Used in a Template Engine in GitLab AI Gateway
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1336 |
| Vendor | gitlab |
| Product | gitlab ai gateway |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
GitLab / GitLab AI Gateway
18.1.6 < 19.2.4 19.3 < 19.3.2 19.4 < 19.4.1
References
Credits
Thanks [invisiblemeerkat](https://hackerone.com/invisiblemeerkat) for responsibly disclosing this issue