CVE-2026-32274

UNKNOWN 0.0

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

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Black is the uncompromising Python code formatter. Prior to 26.3.1, Black writes a cache file, the name of which is computed from various formatting options. The value of the --python-cell-magics option was placed in the filename without sanitization, which allowed an attacker who controls the value of this argument to write cache files to arbitrary file system locations. Fixed in Black 26.3.1.

CWE	CWE-22
Vendor	psf
Product	black
Published	Mar 12, 2026
Last Updated	Mar 13, 2026

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Affected Versions

psf / black

< 26.3.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/psf/black/security/advisories/GHSA-3936-cmfr-pm3m github.com: https://github.com/psf/black/pull/5038 github.com: https://github.com/psf/black/commit/4937fe6cf241139ddbfc16b0bdbb5b422798909d github.com: https://github.com/psf/black/releases/tag/26.3.1