CVE-2026-32274

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

Published: Mar 12, 2026Updated: Aug 3, 2026 Sources: CVE List NVD GHSACWE-22

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-22

Affected Products

oss-project·US

oss-project

blackLibrary

OSS Libraries / generic-library

PyPI

package-ecosystem

black

OSS Libraries

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Collection

Discovery

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References

https://access.redhat.com/errata/RHSA-2026:10184

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:13545

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:13553

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and 12 more references View all →

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