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

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...

EUVD-2026-41438

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...

Improper Authentication

Overview fast-mcp-telegram is a Multi-tenant Telegram gateway for AI agents — HTTP+stdio transport, 8 agent-optimized tools, MTProto User API Affected versions of this package are vulnerable to Improper Authentication via the SessionFileTokenVerifier.verifytoken process. An attacker can gain...

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...