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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
NVD MITRE
EPSS Score
0.6%
Top 53.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
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

python
oss-project·US
black
OSS Libraries
psf
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
View detailed technique mapping

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
access.redhat.com
and 12 more references View all →

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