CVE-2026-89418highCWE-674

CVE-2026-89418: high-severity vulnerability in Google protobuf-javascript (aka…

Uncontrolled Recursion leading to Denial of Service in protobuf-javascript (google-protobuf)

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
Google · protobuf-javascript (aka google-protobuf npm package)