What is CVE-2026-59890?

CVE-2026-59890 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD) on macOS APFS/HFS+

Which CVE IDs does CVE-2026-59890 cover?

CVE-2026-59890 covers the following CVE IDs: CVE-2026-59890. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-59890?

CVE-2026-59890 has a CVSS v3 base score of 6.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-59890?

CVE-2026-59890 affects 2 products, including: azl3 python-setuptools 69.0.3-5 on Azure Linux 3.0; azl3 python-setuptools 69.0.3-6 on Azure Linux 3.0.

CVE-2026-59890MediumCVSS 6.1

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

Vendor

Microsoft Security Response Center (MSRC)

Published

July 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-59890 →

🎯 Affected products2

azl3 python-setuptools 69.0.3-5 on Azure Linux 3.0
azl3 python-setuptools 69.0.3-6 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 69.0.3-6

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59890
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade