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CVE-2026-75857: Mcp Stdio Unverified Spawncve-2026-75857-mcp-stdio-unverified-spawn

Calling `validate_before_stdio_spawn` directly instead of preparing and binding the launch via `prepare_stdio_launch` creates a TOCTOU race condition where spawned executables or arguments may be manipulated between validation and execution.

RustCVE-2026-75857 CWE-367 CWE-863

by Provallyupdated 2026-09-02Apache-2.0

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