{"id":"CVE-2026-59890","aliases":["BIT-setuptools-2026-59890","GHSA-h35f-9h28-mq5c","PYSEC-2026-3447"],"url":"https://o3.security/vulnerability/CVE-2026-59890","summary":"setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD) on macOS APFS/HFS+","details":"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.","published":"2026-07-08T16:02:07.519Z","modified":"2026-08-12T03:51:25.668579400Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"},"epss":{"score":0.00405,"percentile":0.33836,"asOf":"2026-09-07"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"setuptools","fixedVersion":"83.0.0"}],"fix":{"url":"https://github.com/pypa/setuptools/commit/dd9f436a36486b4cb8a4c70a2321548b0be09b8f","label":"pypa/setuptools@dd9f436"},"references":[{"type":"WEB","url":"https://github.com/pypa/setuptools/releases/tag/v83.0.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59890.json"},{"type":"ADVISORY","url":"https://github.com/pypa/setuptools/security/advisories/GHSA-h35f-9h28-mq5c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59890"},{"type":"FIX","url":"https://github.com/pypa/setuptools/commit/dd9f436a36486b4cb8a4c70a2321548b0be09b8f"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:25.668579400Z"}}