GHSA-W3V8-GMH9-3WV7 NLTK: ReDoS in nltk.tgrep via unvalidated user-supplied regular expressions

Summary The NLTK tgrep module accepts user-supplied regular expressions and passes them to the Python re engine without a timeout or validation, enabling catastrophic backtracking ReDoS. Applications that expose the tgrep API to external input are vulnerable to a single-request denial of service...

NLTK: ReDoS in nltk.tgrep via unvalidated user-supplied regular expressions

Summary The NLTK tgrep module accepts user-supplied regular expressions and passes them to the Python re engine without a timeout or validation, enabling catastrophic backtracking ReDoS. Applications that expose the tgrep API to external input are vulnerable to a single-request denial of service...