# CVE-2026-1868 — GitLab AI Gateway

> As of 2026-02-09, CVE-2026-1868 is a CRITICAL-severity vulnerability in GitLab AI Gateway, CVSS v3.1 9.9, EPSS 0.5% (46.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-1868, most recently “GitLab AI Gateway critical RCE via prompt template sandbox escape (CVE-2026-90970)”.

**Last updated:** 2026-02-09

## What is CVE-2026-1868?

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.

The record classifies CVE-2026-1868 under weakness class [CWE-1336](https://intel.threadlinqs.com/cwe/CWE-1336). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 258 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.9 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.5% probability of exploitation in the next 30 days, higher than 46.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 8.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-02-09

## Is CVE-2026-1868 being exploited?

Weaponised exploit code for CVE-2026-1868 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 25 in the Threadlinqs vulnerability feed.

- [trickest/cve](https://github.com/trickest/cve/blob/main/2026/CVE-2026-1868.md) (trickest)

## Affected products and versions

- [GitLab](https://intel.threadlinqs.com/vendors/gitlab): AI Gateway

## How to fix CVE-2026-1868

No vendor patch reference has been recorded for CVE-2026-1868 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-1868

1 tracked threat in the Threadlinqs corpus references CVE-2026-1868, either in the campaign’s CVE list or as an indicator on the campaign record.

- [GitLab AI Gateway critical RCE via prompt template sandbox escape (CVE-2026-90970)](https://intel.threadlinqs.com/threat/TL-2026-2846) — CRITICAL · 2026-10-02

## Sources

Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10.

**Other references**

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

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-1868
Full detection coverage and IOCs for threats exploiting CVE-2026-1868 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp