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CVE PROGRAM SOURCE RECORD8.2 High

CVE-2026-0994

Denial of Service in Python Protobuf

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Status
Published
Published
Updated
Assigning organization
Google

Description

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Python Protobuf

Default version status: unaffected

  • <=v33.4affected

References