PyPI/black CVE-2026-32274: high 7.5, EPSS 0.74%

Black: Arbitrary file writes from unsanitized user input in cache file name

Action: Upgrade black to 26.3.1 or later.

pip install black==26.3.1

Affected

Fixed versions

Sources

• osv: GHSA-3936-cmfr-pm3m
• https://github.com/psf/black/security/advisories/GHSA-3936-cmfr-pm3m
• https://nvd.nist.gov/vuln/detail/CVE-2026-32274
• https://github.com/psf/black/pull/4176
• https://github.com/psf/black/pull/5038
• https://github.com/psf/black/commit/4937fe6cf241139ddbfc16b0bdbb5b422798909d
• https://github.com/psf/black/commit/ed770ba4dd50c419148a0fca2b43937a7447e1f9
• https://access.redhat.com/errata/RHSA-2026:10184
• https://access.redhat.com/errata/RHSA-2026:13545
• https://access.redhat.com/errata/RHSA-2026:13553
• https://access.redhat.com/security/cve/CVE-2026-32274
• https://bugzilla.redhat.com/show_bug.cgi?id=2447111
• https://github.com/psf/black
• https://github.com/psf/black/releases/tag/26.3.1
• https://github.com/pypa/advisory-database/tree/main/vulns/black/PYSEC-2026-2121.yaml
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32274.json

CVE-2026-32274 · published 2026-03-12T18:33:10Z · modified 2026-09-10T03:50:36.703011526Z · JSON