pypa/setuptools vulnerable to Regular Expression Denial of Service (ReDoS)
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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | setuptools | < 65.5.1 | 65.5.1 |
References
- https://github.com/pypa/setuptools/blob/fe8a98e696241487ba6ac9f91faa38ade939ec5d/setuptools/package_index.py#L200
- https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/
- https://github.com/pypa/setuptools/compare/v65.5.0...v65.5.1
- https://github.com/pypa/setuptools/commit/43a9c9bfa6aa626ec2a22540bea28d2ca77964be
- https://pyup.io/vulnerabilities/CVE-2022-40897/52495/
- https://github.com/advisories/GHSA-r9hx-vwmv-q579
- https://nvd.nist.gov/vuln/detail/CVE-2022-40897
- https://github.com/pypa/setuptools/issues/3659
- https://setuptools.pypa.io/en/latest
- https://security.netapp.com/advisory/ntap-20240621-0006
- https://security.netapp.com/advisory/ntap-20230214-0001
- https://pyup.io/vulnerabilities/CVE-2022-40897/52495
- https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YNA2BAH2ACBZ4TVJZKFLCR7L23BG5C3H
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ADES3NLOE5QJKBLGNZNI2RGVOSQXA37R
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YNA2BAH2ACBZ4TVJZKFLCR7L23BG5C3H
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ADES3NLOE5QJKBLGNZNI2RGVOSQXA37R
- https://lists.debian.org/debian-lts-announce/2024/09/msg00018.html
- https://github.com/pypa/setuptools
- https://github.com/pypa/advisory-database/tree/main/vulns/setuptools/PYSEC-2022-43012.yaml
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-1333- Platform
- Python (PyPI)
- Package
setuptools- Disclosed
- 23.12.2022
- Updated
- 11.10.2026 14:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2022-43012 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-r9hx-vwmv-q579 - CC BY 4.0
Vulnerability history: setuptools
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 08.2013 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 1
Disclosures per year
- 2017: 0
- 2018: 0
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 1
- 2023: 0
- 2024: 1
- 2025: 1
- 2026: 1
earlier: 1
-
pypa/setuptools vulnerable to Regular Expression Denial of Service (ReDoS) this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.