🛡️ CVE-2024-21503
🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-1333 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Versions of the package black before 24.3.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the lines_with_leading_tabs_expanded function in the strings.py file. An attacker could exploit this vulnerability by crafting a malicious input that causes a denial of service. Exploiting this vulnerability is possible when running Black on untrusted input, or if you habitually put thousands of leading tab characters in your docstrings.

Details

Severity Medium
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE CWE-1333
Public Exploit ✅ No
Source NVD
Published 2024-03-19
Updated 2026-06-15
Modified 2026-02-04
Fix URL N/A

Affected Packages

Software From version Fixed in
black 24.3.0
unknown

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