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FastMCP MCP client wrappers construct M2M OAuth providers without issuer binding — client secret redirectable to attacker-advertised authorization server

🗓️ 23 Oct 2026 21:31:30Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 3 Views

FastMCP OAuth providers lack issuer binding, allowing client secret redirect to attackers.

Detection
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23 Oct 2026 21:31Current
5.9Medium risk
Vulners AI Score5.9
3