HighVulnerability
CVE-2026-75871: GitLab AI Gateway redirects model requests via crafted Host header override
- Source
- NVD(opens in a new tab)
- Identifier
- CVE-2026-75871
- Published
- Record updated
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 0.3%
Summary
GitLab fixed a vulnerability in the GitLab AI Gateway component, tracked as CVE-2026-75871, affecting versions 18.10 to 19.0.12, 19.1 to 19.1.7, and 19.2 to 19.2.2. An authenticated user with Duo Agent Platform access could use a crafted inline flow configuration that overrides the HTTP Host header to redirect outbound model requests to an externally-controlled endpoint. This could disclose Google Cloud Vertex cloud service credentials and private signing keys.
Mitigation
The source does not state a fix yet. Check the original advisory for updates.
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