chore(deps): update dependency protobuf to v4.25.8 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
protobuf	4.24.4 -> 4.25.8
protobuf	==4.24.4 -> ==4.25.8

GitHub Vulnerability Alerts

CVE-2025-4565

Summary

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.

Reporter: Alexis Challande, Trail of Bits Ecosystem Security Team
ecosystem@trailofbits.com

Affected versions: This issue only affects the pure-Python implementation of protobuf-python backend. This is the implementation when PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python environment variable is set or the default when protobuf is used from Bazel or pure-Python PyPi wheels. CPython PyPi wheels do not use pure-Python by default.

This is a Python variant of a previous issue affecting protobuf-java.

Severity

This is a potential Denial of Service. Parsing nested protobuf data creates unbounded recursions that can be abused by an attacker.

Proof of Concept

For reproduction details, please refer to the unit tests decoder_test.py and message_test

Remediation and Mitigation

A mitigation is available now. Please update to the latest available versions of the following packages:

• protobuf-python(4.25.8, 5.29.5, 6.31.1)

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Configuration

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: poetry.lock

Updating dependencies
Resolving dependencies...


Because flytezen depends on flytekit (1.10.2) which depends on protobuf (<4.25.0), protobuf is required.
So, because flytezen depends on protobuf (4.25.8), version solving failed.