Insecure Template Expansion in GitLab AI Gateway Affects Multiple Versions
CVE-2026-1868

9.9CRITICAL

Key Information:

Vendor

Gitlab
Status
Gitlab Ai Gateway
Vendor
CVE Published:
9 February 2026

What is CVE-2026-1868?

GitLab has addressed a significant vulnerability within the Duo Workflow Service component of the GitLab AI Gateway. This affects all versions from 18.1.6 to 18.8.0, where the AI Gateway faces risks associated with insecure template expansion of user-supplied data through manipulated Duo Agent Platform Flow definitions. This issue could potentially lead to Denial of Service or unauthorized code execution on the Gateway. Remedial actions have been implemented in versions 18.6.2, 18.7.1, and 18.8.1.

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Deploy the Patch

Affected Version(s)

GitLab AI Gateway 18.1.6 < 18.6.2

GitLab AI Gateway 18.7.0 < 18.7.1

GitLab AI Gateway 18.8.0 < 18.8.1

References

https://gitlab.com/gitlab-org/modelops/applied-ml/code-su...
https://about.gitlab.com/releases/2026/02/06/patch-releas...

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability has been discovered internally by GitLab team member Joern Schneeweisz
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