[Security] [P1] CVE-2025-47273 GHSA-5rjg-fvgr-3xxf — setuptools (qbeast-spark)

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Dependabot Security Alert

Field	Value
GHSA	GHSA-5rjg-fvgr-3xxf
CVE	CVE-2025-47273
Severity	high
Package	setuptools (pip)
Affected version	runtime
Summary	setuptools has a path traversal vulnerability in PackageIndex.download that leads to Arbitrary File Write
Repository	Qbeast-io/qbeast-spark

Description

Summary

A path traversal vulnerability in PackageIndex was fixed in setuptools version 78.1.1

Details

    def _download_url(self, url, tmpdir):
        # Determine download filename
        #
        name, _fragment = egg_info_for_url(url)
        if name:
            while '..' in name:
                name = name.replace('..', '.').replace('\\', '_')
        else:
            name = "__downloaded__"  # default if URL has no path contents

        if name.endswith('.[egg.zip](http://egg.zip/)'):
            name = name[:-4]  # strip the extra .zip before download

 -->       filename = os.path.join(tmpdir, name)

Here: https://github.com/pypa/setuptools/blob/6ead555c5fb29bc57fe6105b1bffc163f56fd558/setuptools/package_index.py#L810C1-L825C88

os.path.join() discards the first argument tmpdir if the second begins with a slash or drive letter.
name is derived from a URL without sufficient sanitization. While there is some attempt to sanitize by replacing instances of '..' with '.', it is insufficient.

Risk Assessment

As easy_install and package_index are deprecated, the exploitation surface is reduced.
However, it seems this could be exploited in a similar fashion like GHSA-r9hx-vwmv-q579, and as described by POC 4 in GHSA-cx63-2mw6-8hw5 report: via malicious URLs present on the pages of a package index.

Impact

An attacker would be allowed to write files to arbitrary locations on the filesystem with the permissions of the process running the Python code, which could escalate to RCE depending on the context.

References

https://huntr.com/bounties/d6362117-ad57-4e83-951f-b8141c6e7ca5
pypa/setuptools#4946

Alert link

View on GitHub

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Automatically created by the Vanta/Dependabot → ZenHub sync pipeline
GHSA: GHSA-5rjg-fvgr-3xxf

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The underlying Vanta vulnerability CVE-2025-47273 is no longer reported as open (fixed, dismissed, or deactivated) as of 2026-05-01T07:01:01+00:00 UTC.

Please close this issue once the fix has been verified.