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.
History

Fri, 23 Jan 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 23 Jan 2026 15:15:00 +0000

Type Values Removed Values Added
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.
Title Denial of Service in Python Protobuf
Weaknesses CWE-674
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Google

Published: 2026-01-23T14:55:16.876Z

Updated: 2026-01-23T15:34:38.915Z

Reserved: 2026-01-15T15:16:22.904Z

Link: CVE-2026-0994

cve-icon Vulnrichment

Updated: 2026-01-23T15:33:53.235Z

cve-icon NVD

Status : Received

Published: 2026-01-23T15:16:06.840

Modified: 2026-01-23T15:16:06.840

Link: CVE-2026-0994

cve-icon Redhat

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