PT-2026-56503 · Pypa · Setuptools

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-59890

Mitre

CVSS v3.1

6.1

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

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.

Exploit

Fix

Weakness Enumeration

CWE-697

CWE-176

Related Identifiers

CVE-2026-59890

Affected Products

Setuptools

References · 4

• 🔥 https://github.com/pypa/setuptools/security/advisories/GHSA-h35f-9h28-mq5c · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-59890 · Security Note
• https://github.com/pypa/setuptools/commit/dd9f436a36486b4cb8a4c70a2321548b0be09b8f · Note
• https://github.com/pypa/setuptools/releases/tag/v83.0.0 · Note