VYPR
High severityNVD Advisory· Published Jun 16, 2025· Updated Jun 16, 2025

Unbounded recursion in Python Protobuf

CVE-2025-4565

Description

Any project that uses Protobuf Pure-Python backend to parse untrusted Protocol Buffers data containing an arbitrary number of recursive groups, recursive messages or a series of SGROUP tags can be corrupted by exceeding the Python recursion limit. This can result in a Denial of service by crashing the application with a RecursionError. We recommend upgrading to version =>6.31.1 or beyond commit 17838beda2943d08b8a9d4df5b68f5f04f26d901

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
protobufPyPI
< 4.25.84.25.8
protobufPyPI
>= 5.26.0rc1, < 5.29.55.29.5
protobufPyPI
>= 6.30.0rc1, < 6.31.16.31.1

Affected products

95

Patches

Vulnerability mechanics

References

8

News mentions

0

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