GitLab fixes 1 high-severity vulnerability in AI Gateway

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[TLP:CLEAR] GitLab fixes 1 high-severity vulnerability in AI Gateway

GitLab fixes 1 vulnerability in GitLab AI Gateway in versions 18.6.2, 18.7.1 and 18.8.1 [1].

GitLab AI Gateway - DoS (CVE-2026-1868)

CVSS 9.9 (Critical)

Due to insufficiently secure processing of user-supplied input, an authenticated remote attacker can cause a DoS attack or execute code in the Duo Workflow Service component [1].

The vulnerability is present in product:

GitLab AI Gateway; >=18.1.6, <18.6.2; >=18.7.0, <18.7.1; >=18.8.0, <18.8.1

CVSS: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

More information:

CVE-2026-1868 at cve.org, NVD
CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine at cwe.mitre.org

The vulnerability was publicly disclosed 6. 2. 2026.

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[TLP:CLEAR] GitLab fixes 1 high-severity vulnerability in AI Gateway

GitLab AI Gateway - DoS (CVE-2026-1868)

CVSS 9.9 (Critical)

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