Jan Local API Server CORS Origin Reflection via 0.0.0.0 Binding
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| janhq | jan | unaffected |
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| Janhq | Jan |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.331% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Janhq
Janhq jan |
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| Vendors & Products |
Janhq
Janhq jan |
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| Description | 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. | |
| Title | Jan Local API Server CORS Origin Reflection via 0.0.0.0 Binding | |
| Weaknesses | CWE-183 CWE-942 |
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| References |
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| Metrics |
cvssV3_1
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