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GHSA-fj7x-q9j7-g6q6

Black vulnerable to Regular Expression Denial of Service (ReDoS)

Source: GitHub Advisory Database (reviewed) Moderate CVE-2024-21503

Packages

EcosystemPackageAffectedFixed in
PyPI black < 24.3.0 24.3.0

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.