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TI-2026-42704 Aliases CVE-2026-59890GHSA-h35f-9h28-mq5c

setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD) on macOS APFS/HFS+

Priority MEDIUM 60CWE-176Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0053 45th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed setuptools (pypa): 83.0.0setuptools (PyPI): 83.0.0Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pypasetuptoolsbefore 83.0.083.0.0Patch availableCNA
—setuptools (PyPI)before 83.0.083.0.0Patch availableGHSA-h35f-9h28-mq5c
  • setuptools Vendorpypa Affected before 83.0.0 Fixed in 83.0.0 Patch available CNA
  • setuptools (PyPI) Vendor— Affected before 83.0.0 Fixed in 83.0.0 Patch available GHSA-h35f-9h28-mq5c

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:python:setuptools:*:*:*:*:*:*:*:*before 83.0.0Vulnerablepython-pillow
  • cpe:2.3:a:python:setuptools:*:*:*:*:*:*:*:* Versions before 83.0.0 Vulnerable ·python-pillow

Remediation

  • Fix · CNA setuptools (pypa) Fixed in 83.0.0
  • Fix · GHSA-h35f-9h28-mq5c setuptools (PyPI) Fixed in 83.0.0 Advisory →

Red Hat 1 advisory

  • RHSA-2026:37530 Released 2026-07-10 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images python-setuptools-83.0.0-4.hum1@src, python-setuptools-wheel-83.0.0-4.hum1@noarch@public-hummingbird-aarch64-rpms, python-setuptools-wheel-83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:37530
Not affected: 28 products
  • Exploit Intelligence
  • Lightspeed Core
  • Migration Toolkit for Applications 8
  • Migration Toolkit for Virtualization
  • Network Observability Operator
  • OpenShift Lightspeed
  • OpenShift Service Mesh 3
  • Red Hat AI Inference Server
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ceph Storage 7
  • Red Hat Ceph Storage 9
  • Red Hat Developer Hub 1
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux AI (RHEL AI) 3
  • Red Hat Hardened Images
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Dev Spaces
  • Red Hat OpenShift Virtualization 4
  • Red Hat Quay 3
  • Red Hat Satellite 6
  • Red Hat Trusted Artifact Signer
  • Red Hat build of Quarkus Native builder
  • Self-service automation portal 2
  • Service Telemetry Framework 1.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59890
  2. 2026-10-03 Alias added: GHSA-h35f-9h28-mq5c
  3. 2026-10-27 Affected versions changed · Red Hat

References

Exploit 1

Patch 1

Advisory 1

Other 3

  • TI-2025-29803 setuptools has a path traversal vulnerability in PackageIndex.download that leads to Arbitrary File Write CVSS 4.0HIGH 7.7
  • TI-2024-05888 Remote Code Execution in pypa/setuptools CVSS 3.0HIGH 8.8
  • TI-2026-78525 Shell command injection in virtualenv generated POSIX launchers CVSS 3.1HIGH 7.8
  • TI-2026-78526 Command injection in virtualenv bash activation prompt CVSS 4.0HIGH 7.1
  • TI-2026-78521 Code injection in virtualenv Xonsh activation script CVSS 4.0HIGH 7.1
  • TI-2026-19377 wheel Allows Arbitrary File Permission Modification via Path Traversal CVSS 3.1HIGH 7.1
See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences