CVE-2026-55546 QWED-MCP: Unsafe SymPy `parse_expr()` Remote Code Execution via Unsanitized Math Expression Input

QWED-MCP is a deterministic verification gateway for MCP. Prior to 0.2.1, verifymathexpression in src/qwedmcp/engines/mathengine.py passes attacker-controlled expression and claimedresult strings directly to SymPy's parseexpr after only normalizing caret syntax to Python exponent syntax, without...