Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python | Black | < 26.3.1 |
Related Weaknesses (CWE)
References
- https://github.com/psf/black/commit/4937fe6cf241139ddbfc16b0bdbb5b422798909dPatch
- https://github.com/psf/black/pull/5038Issue TrackingPatch
- https://github.com/psf/black/releases/tag/26.3.1Release Notes
- https://github.com/psf/black/security/advisories/GHSA-3936-cmfr-pm3mVendor Advisory
FAQ
What is CVE-2026-32274?
CVE-2026-32274 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 opti...
How severe is CVE-2026-32274?
CVE-2026-32274 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32274?
Check the references section above for vendor advisories and patch information. Affected products include: Python Black.