GHSA-2rrw-hpqm-36pv

Duplicate Advisory: ReDoS in nltk.text.Text.findall() via unvalidated user-supplied regular expressions

Published

2026-08-26

Modified

2026-09-08

Sources

github-advisory

Summary

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-rrv8-h7p8-rx55. This link is maintained to preserve external references. ## Original Description NLTK versions before 3.10.0 contain a regular expression denial of service vulnerability in Text.findall() and TokenSearcher.findall() methods that accept user-supplied regular expressions without validation or timeout. Attackers can supply crafted regex patterns that cause catastrophic backtracking, resulting in indefinite CPU saturation and denial of service to all users of the Python process.

Affected packages

Remediation: No patched version is listed by GitHub.

References

• https://github.com/advisories/GHSA-2rrw-hpqm-36pv