{"id":"CVE-2022-40897","aliases":["GHSA-r9hx-vwmv-q579","BIT-setuptools-2022-40897","PYSEC-2022-43012"],"title":"pypa/setuptools vulnerable to Regular Expression Denial of Service (ReDoS)","summary":"pypa/setuptools vulnerable to Regular Expression Denial of Service (ReDoS)","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"setuptools","product":"setuptools","ecosystem":"pip","affected":["setuptools < 65.5.1"],"patched":["setuptools 65.5.1"],"published":"2022-12-23","updated":"2026-08-07","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-r9hx-vwmv-q579","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-40897"},{"url":"https://github.com/pypa/setuptools/issues/3659"},{"url":"https://github.com/pypa/setuptools/commit/43a9c9bfa6aa626ec2a22540bea28d2ca77964be"},{"url":"https://setuptools.pypa.io/en/latest"},{"url":"https://security.netapp.com/advisory/ntap-20240621-0006"},{"url":"https://security.netapp.com/advisory/ntap-20230214-0001"},{"url":"https://pyup.io/vulnerabilities/CVE-2022-40897/52495"},{"url":"https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YNA2BAH2ACBZ4TVJZKFLCR7L23BG5C3H"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ADES3NLOE5QJKBLGNZNI2RGVOSQXA37R"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YNA2BAH2ACBZ4TVJZKFLCR7L23BG5C3H"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ADES3NLOE5QJKBLGNZNI2RGVOSQXA37R"},{"url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00018.html"},{"url":"https://github.com/pypa/setuptools/compare/v65.5.0...v65.5.1"},{"url":"https://github.com/pypa/setuptools/blob/fe8a98e696241487ba6ac9f91faa38ade939ec5d/setuptools/package_index.py#L200"},{"url":"https://github.com/pypa/setuptools"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/setuptools/PYSEC-2022-43012.yaml"}],"tags":["osv","pip"],"epss":0.02617,"epssPercentile":0.84698,"ingestedAt":"2026-08-07T19:14:14.634Z","slug":"CVE-2022-40897","body":"## Overview\n\nPython 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.\n\n## Affected packages\n\n- `setuptools < 65.5.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `setuptools 65.5.1`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.5,"exploitation":0,"ransomware":0},"changes":[]}