Bug 2567494 (CVE-2026-121967)

Summary: CVE-2026-121967 github.com/coder/coder: Coder: Unauthorized upstream provider access via path traversal in AI Gateway
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Coder. This vulnerability allows an authenticated attacker to gain unauthorized access to upstream provider endpoints using the deployment's centrally managed credentials. The issue occurs because the AI Gateway passthrough router forwards percent-encoded dot segments without validating or rejecting them. An authenticated user can send crafted path traversal sequences under allowlisted path prefixes to interact with unintended provider services.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-11-05 22:02:24 UTC 
Coder 2.28.0 before 2.29.22, 2.30.0 before 2.34.13, 2.35.0 before 2.35.10, 2.36.0 before 2.36.8, 2.37.0 before 2.37.5, and 2.38.0 before 2.38.1 contains a path traversal vulnerability in the AI Gateway passthrough router, which forwards percent-encoded dot segments upstream without rejecting them. Authenticated users can send paths such as %2e%2e or ..%2F under allowlisted prefixes to reach unintended provider endpoints using the deployment's centrally managed provider key.