Critical Fast-MCP-Telegram Vulnerability Allows Authentication Bypass via Path Traversal
RedSide Security July 07, 2026 Vulnerability 2 views
A critical authentication bypass vulnerability (**CVE-2026-52830**) in Fast-MCP-Telegram allows attackers to exploit path traversal flaws in Bearer token validation and gain unauthorized access to Telegram sessions. Users are strongly advised to upgrade to version 0.19.1 immediately.
CVE
Cybersecurity
Exploit
Information Security
Security Research
Threat Intelligence
Red Team
Blue Team
Open Source Security
Authentication Bypass
AI Security
Vulnerability
Infosec
CVE-2026-52830
Fast MCP Telegram
Telegram Security
Path Traversal
Directory Traversal
MCP Security
Telegram Session Hijacking
MTProto
Access Control
Python Security
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