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CVE-2026-1868 is a critical insecure template expansion vulnerability in the Duo Workflow Service component of GitLab AI Gateway. Affected self-hosted AI Gateway versions improperly process user-supplied data embedded in crafted Duo Agent Platform Flow definitions, allowing unsafe template expansion during workflow handling. Because the service does not adequately sanitize or constrain template evaluation, an authenticated attacker can supply malicious flow content that triggers unintended execution behavior within the Gateway. Depending on how the crafted template is processed, exploitation can result in denial of service or code execution on the GitLab AI Gateway. The issue affects versions before 18.6.2, 18.7.1, and 18.8.1 across the impacted release tracks.
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A previously patched GitLab AI Gateway template-engine vulnerability, rated CVSS 9.9, that an authenticated user could trigger through a crafted flow definition to cause denial of service or code execution. It is mentioned as background because it shares the CWE-1336 weakness class with CVE-2026-90970; the content does not establish a direct relationship between the two flaws.
A critical insecure template expansion / template injection-style flaw in GitLab AI Gateway’s Duo Workflow Service that can be triggered by an authenticated user via crafted Duo Agent Platform Flow definitions, leading to denial of service and potentially arbitrary code execution on the AI Gateway.
A critical insecure template expansion vulnerability in the Duo Workflow Service component of GitLab AI Gateway that can be triggered via crafted Duo Agent Platform Flow definitions, potentially leading to denial of service or code execution on the gateway.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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