CVE-2026-52830

fast-mcp-telegram is a Telegram MCP Server. Prior to 0.19.1, fast-mcp-telegram validates HTTP Bearer tokens by joining the raw token string into a session-file path. The verifier rejects the exact reserved token telegram, but it does not reject path separators or normalize the path before checkin...

CVE-2026-52830

The CVE describes a path-traversal in fast-mcp-telegram prior to 0.19.1 where HTTP Bearer tokens are joined into a session-file path. The verifier rejects only the exact reserved token, not path separators or normalized paths, enabling a remote client to authenticate as the default legacy session...

PT-2026-55313

Name of the Vulnerable Software and Affected Versions fast-mcp-telegram versions prior to 0.19.1 Description fast-mcp-telegram validates HTTP Bearer tokens by joining the raw token string into a session-file path. While the verifier rejects the exact reserved token telegram, it fails to reject pa...