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CVE-2026-32274 — Black: Arbitrary file writes from unsanitized user input in cache file name

Affected: psf black, Red Hat Ansible Automation Platform 2.5, Red Hat Ansible Automation Platform 2.6, Red Hat OpenShift AI 2.25, Red Hat OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Ansible Automation Platform Ansible Core 2, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Virtualization 4

Black is the uncompromising Python code formatter. Starting in version 24.3.0 and prior to version 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.

GHSA-3936-cmfr-pm3m — Black: Arbitrary file writes from unsanitized user input in cache file name

Affected: PyPI: black

### Impact

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.

### Patches

Fixed in Black 26.3.1.

### Workarounds

Do not allow untrusted user input into the value of the `--python-cell-magics` option.

PYSEC-2026-2121

Affected: PyPI: black

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.