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

高 7.5CVE-2026-32274 · GHSA-3936-cmfr-pm3m · PYSEC-2026-2121 · 12/03/2026 公開 · 03/08/2026 更新

パッケージ	影響を受けるバージョン	修正済みバージョン
black PyPI	`≥ 24.3.0, < 26.3.1< 26.3.1`	`26.3.1`
black python	`< 26.3.1`	`26.3.1`

概要

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.

NVD の説明

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.