CVE-2026-66005 — Jan Local API Server CORS Origin Reflection via 0.0.0.0 Binding
Jan 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 …
Published: 2026-07-24 · CVSS: 5.3 · CVSS 4.0
Jan 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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7