# CVE-2026-32274: black: Black is the uncompromising Python code formatter

CVE-2026-32274 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-32274, released March 12, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-32274
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0069
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 12, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | black Debian 13.5 (trixie) | 25.1.0-3+deb13u1 | [DEBIAN-CVE-2026-32274](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32274.md) | Mar 12, 2026 |
| Linux | black Debian 14 | 26.3.1-1 | [DEBIAN-CVE-2026-32274](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32274.md) | Mar 12, 2026 |
| Linux | python-black opensuse-leap 15.6 | 24.3.0-150400.9.11.1 | [SUSE-SU-2026:0900-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0900-1.md) | Mar 13, 2026 |
| Linux | python-black opensuse-leap 16.0 | 25.1.0-160000.3.1 | [OPENSUSE-SU-2026:20417-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20417-1.md) | Mar 24, 2026 |
| Linux | python-black sles 16.0 | 25.1.0-160000.3.1 | [SUSE-SU-2026:20928-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20928-1.md) | Mar 24, 2026 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.