Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
pypa setuptools — setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD) on macOS APFS/HFS+
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L N R U H L N 6.1 .0040 33.9 —
AFFECTED
Product Versions Fixed
setuptools < 83.0.0 – —
TIMELINE
Jul 7 Reserved by GitHub_M
Jul 8 EXPLOIT PUBLISHED — CVE-2026-59890 (pypa setuptools). Public exploit reference added.
Jul 8 Published (CNA: GitHub_M)
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| July 7, 2026 | Reserved | Reserved by GitHub_M |
| July 8, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-59890 (pypa setuptools). Public exploit reference added. |
| July 8, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| pypa | setuptools | — | < 83.0.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-59890 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.