CVE-2026-0994: Google Protobuf

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

A denial-of-service (DoS) vulnerability exists in google.protobuf.json_format.ParseDict() in Python, where the max_recursion_depth limit can be bypassed when parsing nested google.protobuf.Any messages. Due to missing recursion depth accounting inside the internal Any-handling logic, an attacker can supply deeply nested Any structures that bypass the intended recursion limit, eventually exhausting Python’s recursion stack and causing a RecursionError.

Affected products

• Google Protobuf: up to and including 33.4

Published 2026-01-23. Last modified 2026-09-01.