What is CVE-2026-1868?

CVE-2026-1868 is a critical-severity vulnerability in Gitlab Ai Gateway, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 9.9/10. Published 2026-02-09.

How severe is CVE-2026-1868?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Vulnerability in Gitlab Ai Gateway

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.

EPSS: 0.005 (39.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Gitlab Ai Gateway — versions 18.1.6, 18.7.0, 18.8.0

Weakness classification (CWE)

CWE-1336 — Improper Neutralization of Special Elements Used in a Template Engine

References

Frequently asked questions

What is CVE-2026-1868?: CVE-2026-1868 is a critical-severity vulnerability in Gitlab Ai Gateway, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 9.9/10. Published 2026-02-09.
How severe is CVE-2026-1868?: Critical severity. CVSS v3 base score is 9.9 out of 10.