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CVE-2024-21503

MEDIUM
Published 2024-03-19T05:00:01.474Z
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CVSS Score

V3.1
5.3
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.000
probability
of exploitation in the wild

There is a 0.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.081
Higher than 8.1% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
LOW

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

python_software_foundation

black

Affected Versions:

0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Black vulnerable to Regular Expression Denial of Service (ReDoS)

GHSA-fj7x-q9j7-g6q6

Advisory Details

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.

Affected Packages

PyPI black
ECOSYSTEM: ≥0 <24.3.0

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-21503
WEB https://github.com/psf/black/commit/f00093672628d212b8965a8993cee8bedf5fe9b8
PACKAGE https://github.com/psf/black
WEB https://github.com/psf/black/releases/tag/24.3.0
WEB https://github.com/pypa/advisory-database/tree/main/vulns/black/PYSEC-2024-48.yaml
WEB https://security.snyk.io/vuln/SNYK-PYTHON-BLACK-6256273

Advisory provided by GitHub Security Advisory Database. Published: March 19, 2024, Modified: March 20, 2024

References

https://security.snyk.io/vuln/SNYK-PYTHON-BLACK-6256273
https://github.com/psf/black/releases/tag/24.3.0
https://github.com/psf/black/commit/f00093672628d212b8965a8993cee8bedf5fe9b8
Published: 2024-03-19T05:00:01.474Z
Last Modified: 2024-08-01T22:20:40.916Z
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