{"@context":"https://openvex.dev/ns/v0.2.0","@id":"https://database.harborguard.co/cve/CVE-2026-52830/vex.json","author":"HarborGuard Database","role":"Document Creator","timestamp":"2026-07-02T20:39:35.927Z","version":1,"tooling":"HarborGuard Database (https://database.harborguard.co)","statements":[{"vulnerability":{"name":"CVE-2026-52830","@id":"https://www.cve.org/CVERecord?id=CVE-2026-52830","description":"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 checking whether the session file exists. A remote HTTP client can therefore authenticate as the default legacy session with a token such as ../fast-mcp-telegram/telegram when the documented default session fil"},"products":[{"@id":"cpe:2.3:a:leshchenko1979:fast-mcp-telegram:\\<_0.19.1:*:*:*:*:*:*:*","identifiers":{"cpe23":"cpe:2.3:a:leshchenko1979:fast-mcp-telegram:\\<_0.19.1:*:*:*:*:*:*:*"}}],"status":"affected","action_statement":"No fixed version is published yet; monitor the upstream advisory.","timestamp":"2026-07-02T20:39:35.927Z"}]}