Home/CVE/nltk is vulnerable to Inefficient Regular Expression Complexity
CVE

CVE-2021-3842

nltk is vulnerable to Inefficient Regular Expression Complexity

nltk is vulnerable to Inefficient Regular Expression Complexity.

HIGH · CVSS 7.5 EPSS 0.0017
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1333Inefficient Regular Expression Complexity
▤

Affected Products & Versions

3
nltk< 3.6.6
debian linuxall versions
fedoraproject fedoraall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI nltk HIGH fixed in 3.6.6
⚠

Public Exploits & PoCs

1
pochuntr.dev · 761a761e-2be2-430a-8d92-6f74ffe9866ahuntr.dev
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@huntr.dev
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Jan 2022 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

1
usnUSN-7365-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/nltk/nltk/commit/2a50a3edc9d35f57ae42a921c621edc160877f4dPatchThird Party Advisory
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