Unverified50% confidenceFactExact time
MCP Servers usually run as the user and obtain the same credentials as the user (local file system access, API keys, OAuth tokens), so a malicious or vulnerable Server could in theory read anything within its authorized scope.
1
Sources
50%
Confidence
Long-term
Relevance
10/22/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe MCP server acts as an OAuth-protected resource and Entra ID as the authorization server; clients without a token receive an authentication challenge and discover the authorization metadata; the server must validate issuer, audience, validity period and scope or role; a token intended for a downstream API should not be automatically accepted as a token for accessing this MCP server.79% similarUnverifiedWhen an MCP server cannot reliably identify the client making a request, any entity that can reach that service endpoint may obtain data or invoke tools under the guise of a legitimate client.78% similarUnverifiedThe server's two methods, tools/list and initialize, support anonymous reads, so MCP registries can index the server without a key.78% similarUnverifiedA malicious MCP Server may reach the user's files and keys.78% similarUnverifiedMCP tool calls trigger real operations (writing to databases, sending emails, etc.), so permission control and audit logging are especially important at the MCP server layer, which differs from API integrations that are primarily read-only queries.78% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1085527API
curl https://kongchang.com/api/v1/knowledge/claims/1085527MCP
get_claim(id=1085527)