CVE-2026-59890

mediumCVSS 6.1covered by 2 sourcesfirst seen 2026-07-02

setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. Prior to 83.0.0, FileList applied MANIFEST.in exclude, global-exclude, recursive-exclude, and prune directives by matching compiled glob patterns against on-disk file names without Unicode normalization, so on macOS APFS or HFS+ an NFD file name could bypass an NFC exclusion rule and be packed into a source distribution. This issue is fixed in version 83.0.0.

CSIRTS triage

What: A MANIFEST.in exclusion bypass can occur due to Unicode normalization collision on macOS APFS/HFS+.
Who is affected: Users of setuptools on macOS are affected.
Urgency: Remediation is medium urgency due to the medium severity of the issue.
Action: Update setuptools to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.

Advisory coverage (2)

mediumCVE-2026-59890: setuptools is a package that allows users to download, build, install, upgrade, and uninstall …nvd · 2026-07-08
mediumCVE-2026-59890: setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD…msrc · 2026-07-02

External references

NVD record for CVE-2026-59890

CVE.org record

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