pypa/setuptools vulnerable to Regular Expression Denial of Service (ReDoS)

MITTEL 5.9CVE-2022-40897 · BIT-setuptools-2022-40897 · GHSA-r9hx-vwmv-q579 · Published 23/12/2022 · updated 17/06/2026

Package	Affected versions	Patched versions
setuptools PyPI	`< 65.5.1`	`65.5.1`
setuptools python	`< 65.5.1`	`65.5.1`

Description

Python Packaging Authority (PyPA)'s setuptools is a library designed to facilitate packaging Python projects. Setuptools version 65.5.0 and earlier could allow remote attackers to cause a denial of service by fetching malicious HTML from a PyPI package or custom PackageIndex page due to a vulnerable Regular Expression in package_index. This has been patched in version 65.5.1.

NVD description

Python Packaging Authority (PyPA) setuptools before 65.5.1 allows remote attackers to cause a denial of service via HTML in a crafted package or custom PackageIndex page. There is a Regular Expression Denial of Service (ReDoS) in package_index.py.

References

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