protobuf-javascript (aka google-protobuf npm package): uncontrolled recursion

High8.7CVE-2026-89418 · Published Sep 17, 2026 · updated Sep 18, 2026

google-protobuf contains an unbounded recursion when parsing unknown protobuf group fields. An attacker can send a small crafted payload of deeply nested START_GROUP wire bytes to any Node.js service that calls the generated deserializeBinary() API, causing a RangeError: Maximum call stack size exceeded and crashing the process. No authentication or prior knowledge of the schema is required.