CVE-2026-32274

HIGH EPSS 34.0%
Published Mar 12, 20263mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Mar 12, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
34.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 1

VendorProductVersionRange
pythonblack* <26.3.1

References 4

  • github.com https://github.com/psf/black/commit/4937fe6cf241139ddbfc16b0bdbb5b422798909d
    Patch
  • github.com https://github.com/psf/black/pull/5038
    Issue TrackingPatch
  • github.com https://github.com/psf/black/releases/tag/26.3.1
    Release Notes
  • github.com https://github.com/psf/black/security/advisories/GHSA-3936-cmfr-pm3m
    Vendor Advisory

Remediation

  • github.com https://github.com/psf/black/commit/4937fe6cf241139ddbfc16b0bdbb5b422798909d
    Patch
  • github.com https://github.com/psf/black/pull/5038
    Issue TrackingPatch