VULNERABILITY INTELLIGENCE
CVE-2024-21503
CVSS score5.3 MEDIUM
EPSS probability0.98%
CISA KEVNot currently listed
Published2024-03-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
Weakness classification
- report@snyk.io: CWE-1333
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-75