23 Oct 2026 15:48:27 UTC
Jan Local API Server CORS Origin Reflection via 0.0.0.0 Binding
cve-program · CVE-2026-66005 · Published
CVE-2026-66005
Jan Local API Server CORS Origin Reflection via 0.0.0.0 Binding
CVSS 4.0 5.3 MEDIUMCVSS 3.1 6.3 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-66005
PublishedJan through 0.8.4, fixed in commit 3e1c1e7, contains a CORS misconfiguration vulnerability in its local API server that allows network-adjacent attackers to bypass trusted host restrictions by exploiting the server's replacement of user-configured trusted hosts with a wildcard that reflects arbitrary origins with credentials. Attackers on the local network or using DNS rebinding can reach the unauthenticated OpenAI-compatible API to perform inference, enumerate models, invoke MCP tools, and read cross-origin responses.
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