CVE-2021-3828 nltk is vulnerable to Inefficient Regular Expression Complexity

Description

nltk is vulnerable to Inefficient Regular Expression Complexity

Affected products and versions

Product	Affected versions	Fixed in
nltk/nltk 3.6	earliest → 3.6.3	No fix stated

Other CVEs of nltk/nltk

The 12 CVEs of nltk/nltk →

CVE-2026-12372 A Server-Side Request Forgery (SSRF) vulnerability exists in nltk/nltk versions 3.9.4 and the current develop branch 3.7 Low CVE-2026-12261 A vulnerability in `nltk.downloader` in nltk/nltk… 5.3 Medium CVE-2026-12259 In nltk version 3.9.4, the `nltk.downloader.Downloader._download_package()` function writes downloaded package bytes… 5.3 Medium CVE-2026-12252 In nltk/nltk versions 3.9.3 and earlier, five Stanford interface classes (StanfordPOSTagger, StanfordNERTagger,… 7.8 High