CVE detail
CVE-2026-66005
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 16.1 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 4
- within the 30d window
- Peak daily
- 4
- highest bucket
Evidence
Source links by recency
4 source links · newest first
- https://www.vulncheck.com/advisories/jan-local-api-server-cors-origin-reflection-via-bindingwww.vulncheck.com
No excerpt available.
Exploitwww.vulncheck.comJul 24, 2026, 3:19 PM - https://github.com/janhq/jan/pull/8506github.com
No excerpt available.
Exploitgithub.comJul 24, 2026, 3:19 PM - https://github.com/janhq/jan/issues/8453github.com
No excerpt available.
Exploitgithub.comJul 24, 2026, 3:19 PM No excerpt available.
Exploitgithub.comJul 24, 2026, 3:19 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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