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High severity7.5NVD Advisory· Published Jan 23, 2026· Updated Apr 9, 2026

CVE-2026-0994

CVE-2026-0994

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
protobufPyPI
>= 6.30.0rc1, < 6.33.56.33.5
protobufPyPI
< 5.29.65.29.6

Affected products

112

Patches

Vulnerability mechanics

References

6

News mentions

0

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