CVE-2026-0994

A flaw was found in protobuf. A remote attacker can exploit this denial-of-service (DoS) vulnerability by supplying deeply nested google.protobuf.Any messages to the google.protobuf.json_format.ParseDict() function. This bypasses the intended recursion depth limit, leading to the exhaustion of Python’s recursion stack and causing a RecursionError, which results in a denial of service.

This vulnerability is rated Important for Red Hat products. The flaw in protobuf allows a remote attacker to trigger a denial-of-service by providing specially crafted, deeply nested google.protobuf.Any messages to the google.protobuf.json_format.ParseDict() function. This bypasses the intended recursion depth limit, leading to resource exhaustion and application crashes.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.