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CVE-2026-1868— 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 AI Gateway是美国GitLab公司的一个人工智能服务中间件。 GitLab AI Gateway 18.1.6版本、18.2.6版本、18.3.1版本至18.6.1版本、18.7.0版本和18.8.0版本存在安全漏洞，该漏洞源于通过特制Duo Agent Platform Flow定义对用户提供的数据进行不安全的模板扩展，可能导致拒绝服务或获得网关上的代码执行权限。

CVSS 9.9 · Critical EPSS 0.50% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1868

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 Duo Workflow Service component of GitLab AI Gateway affecting all versions of the AI Gateway from 18.1.6, 18.2.6, 18.3.1 to 18.6.1, 18.7.0, and 18.8.0 in which AI Gateway was vulnerable to insecure template expansion of user supplied data via crafted Duo Agent Platform Flow definitions. This vulnerability could be used to cause Denial of Service or gain code execution on the Gateway. This has been fixed in versions 18.6.2, 18.7.1, and 18.8.1 of the GitLab 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
Vulnerability Title
GitLab AI Gateway 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitLab AI Gateway是美国GitLab公司的一个人工智能服务中间件。 GitLab AI Gateway 18.1.6版本、18.2.6版本、18.3.1版本至18.6.1版本、18.7.0版本和18.8.0版本存在安全漏洞，该漏洞源于通过特制Duo Agent Platform Flow定义对用户提供的数据进行不安全的模板扩展，可能导致拒绝服务或获得网关上的代码执行权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab AI Gateway 18.1.6 ~ 18.6.2 cpe:2.3:a:gitlab:ai-gateway:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-1868

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III. Intelligence Information for CVE-2026-1868

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Patches & Fixes for CVE-2026-1868 (1)

IV. Related Vulnerabilities

Same vendor: GitLab
Same weakness: CWE-1336

V. Comments for CVE-2026-1868

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