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CVE-2026-75871— Server-Side Request Forgery (SSRF) 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 组件中的漏洞。该漏洞影响 AI Gateway 的多个版本范围，包括 18.10 至 19.0.12、19.1 至 19.1.7 以及 19.2 至 19.2.2。 该漏洞可能允许拥有 Duo Agent Platform 访问权限的已认证用户，通过构造一个内联流程配置（inline flow configuration），覆盖 HTTP Host 头部字段，从而将发往模型的出站请求重定向到一个由外部控制的端点。这种攻击可能导致泄露 Google Cloud

CVSS 8.2 · High EPSS 0.19% · P9

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab AI Gateway 18.10< 19.0.12 affected
19.1< 19.1.7 affected
19.2< 19.2.2 affected
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I. Basic Information for CVE-2026-75871

Vulnerability Information
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Vulnerability Title
Server-Side Request Forgery (SSRF) 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 18.10 to 19.0.12, 19.1 to 19.1.7, and 19.2 to 19.2.2 that could have allowed an authenticated user with Duo Agent Platform access to redirect outbound model requests to an externally-controlled endpoint via a crafted inline flow configuration that overrides the HTTP Host header, resulting in disclosure of Google Cloud Vertex cloud service credentials and private signing keys.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab AI Gateway 18.10 ~ 19.0.12 cpe:2.3:a:gitlab:ai-gateway:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-75871

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III. Intelligence Information for CVE-2026-75871

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Other References for CVE-2026-75871 (1)

Same Patch Batch · GitLab · 2026-08-27 · 3 CVEs total

CVE-2026-19889 8.2 HIGH Server-Side Request Forgery (SSRF) in GitLab AI Gateway
CVE-2026-4398 5.4 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab

IV. Related Vulnerabilities

Same product: GitLab AI Gateway
Same vendor: GitLab
Same weakness: CWE-918

V. Comments for CVE-2026-75871

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