CVE-2026-59890 | setuptools is a package that allows users to download, build… | CVSS 6.1 MEDIUM

Description

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.

Metadata

CVE ID: CVE-2026-59890
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-07-07 16:40 UTC
Published: 2026-07-08 16:02 UTC
Last updated: 2026-07-08 16:44 UTC
Primary CWE: CWE-176
CWE-176: Improper Handling of Unicode Encoding
Vendor / Product: pypa / setuptools
Sources: cve.org · NVD

Severity & Metrics

6.1 MEDIUM CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
pypa	setuptools	—	< 83.0.0

Weakness (CWE)

CWE	Source	Description
CWE-176	cna	CWE-176: Improper Handling of Unicode Encoding
CWE-697	cna	CWE-697: Incorrect Comparison

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.1	MEDIUM	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

References (3)

https://github.com/pypa/setuptools/security/advisories/GHSA-h35f-9h28-mq5c https://github.com/pypa/setuptools/security/advisories/GHSA-h35f-9h28-mq5c
https://github.com/pypa/setuptools/commit/dd9f436a36486b4cb8a4c70a2321548b0be09b8f https://github.com/pypa/setuptools/commit/dd9f436a36486b4cb8a4c70a2321548b0be09b8f
https://github.com/pypa/setuptools/releases/tag/v83.0.0 https://github.com/pypa/setuptools/releases/tag/v83.0.0