CVE-2024-21503
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-21503
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-21503.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-21503
- Aliases
- Downstream
- Related
- Published
- 2024-03-19T05:15:09Z
- Modified
- 2025-10-21T17:34:13.829909Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- [none]
- Details
-
Versions of the package black before 24.3.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the lineswithleadingtabsexpanded 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.
- References
Affected packages
Git / github.com/psf/black
Affected ranges
- Type
- GIT
- Repo
- https://github.com/psf/black
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
Affected versions
18.*
18.3a0
18.3a1
18.3a2
18.3a3
18.3a4
18.4a0
18.4a1
18.4a2
18.4a3
18.4a4
18.5b0
18.5b1
18.6b0
18.6b1
18.6b2
18.6b3
18.6b4
18.9b0
19.*
19.10b0
19.3b0
20.*
20.8b0
20.8b1
21.*
21.10b0
21.11b0
21.11b1
21.12b0
21.4b0
21.4b1
21.4b2
21.5b0
21.5b1
21.5b2
21.6b0
21.7b0
21.8b0
21.9b0
22.*
22.1.0
22.10.0
22.12.0
22.3.0
22.6.0
22.8.0
23.*
23.1.0
23.10.0
23.10.1
23.11.0
23.12.0
23.12.1
23.3.0
23.7.0
23.9.0
23.9.1
24.*
24.1.0
24.1.1
24.2.0