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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
GitLab GitLab AI Gateway unaffected
Version Status Constraints
18.10 affected < 19.0.12
19.1 affected < 19.1.7
19.2 affected < 19.2.2

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Gitlab Subscribe
Ai-gateway Subscribe
Advisories

No advisories yet.

Fixes

Solution

Upgrade to version 19.0.12, 19.1.7, 19.2.2, 19.3.0 or newer

Workaround

No workaround given by the vendor.

References
Link Providers
https://gitlab.com/gitlab-org/gitlab/-/work_items/616990 cve-icon cve-icon
https://hackerone.com/reports/3945100 cve-icon cve-icon
History

Thu, 27 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
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.
Title Server-Side Request Forgery (SSRF) in GitLab AI Gateway
First Time appeared Gitlab
Gitlab ai-gateway
Weaknesses CWE-918
CPEs cpe:2.3:a:gitlab:ai-gateway:*:*:*:*:*:*:*:*
Vendors & Products Gitlab
Gitlab ai-gateway
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitLab

Published:

Updated: 2026-08-27T16:33:55.451Z

Reserved: 2026-08-18T12:06:50.452Z

Link: CVE-2026-75871

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-27T17:20:01.503

Modified: 2026-08-27T17:20:01.503

Link: CVE-2026-75871

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses