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CVE-2026-90970— Improper Neutralization of Special Elements Used in a Template Engine in GitLab AI Gateway

Quick assessment

Affected
GitLab GitLab AI Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitLab 已修复 GitLab AI Gateway 组件中的一个漏洞，该漏洞影响以下所有版本： 18.1.6 至 19.2.4（不含 19.2.4）之间的所有 18.1.x 和 19.2.x 版本； 19.3 至 19.3.2（不含 19.3.2）之间的所有 19.3.x 版本； 19.4 至 19.4.1（不含 19.4.1）之间的所有 19.4.x 版本。 在特定条件下，拥有 Duo Agent Platform 访问权限的经过身份验证的攻击者可通过精心构造的流配置（flow configuration）

CVSS 9.9 · Critical

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab AI Gateway 18.1.6< 19.2.4 affected
19.3< 19.3.2 affected
19.4< 19.4.1 affected
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I. Basic Information for CVE-2026-90970

Vulnerability Information
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Vulnerability Title
Improper Neutralization of Special Elements Used in a Template Engine in GitLab AI Gateway
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab AI Gateway 18.1.6 ~ 19.2.4 cpe:2.3:a:gitlab:ai-gateway:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-90970

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III. Intelligence Information for CVE-2026-90970

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Other References for CVE-2026-90970 (1)

IV. Related Vulnerabilities

Same product: GitLab AI Gateway
Same vendor: GitLab
Same weakness: CWE-1336

V. Comments for CVE-2026-90970

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