CVE-2021-3842
HIGHCVSS 7.5/10EPSS 1.50%
Last modified
CVE-2021-3842 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. nltk is vulnerable to Inefficient Regular Expression Complexity. EPSS estimates a 1.50% chance of exploitation in the next 30 days.
Description
nltk is vulnerable to Inefficient Regular Expression Complexity
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nltk | Nltk | < 3.6.6 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Debian | Debian Linux | 11.0 |
| Fedoraproject | Fedora | 35 |
References
- https://github.com/nltk/nltk/commit/2a50a3edc9d35f57ae42a921c621edc160877f4dPatch, Third Party Advisory
- https://huntr.dev/bounties/761a761e-2be2-430a-8d92-6f74ffe9866aExploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/nltk/nltk/commit/2a50a3edc9d35f57ae42a921c621edc160877f4dPatch, Third Party Advisory
- https://huntr.dev/bounties/761a761e-2be2-430a-8d92-6f74ffe9866aExploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3842?
nltk is vulnerable to Inefficient Regular Expression Complexity
How severe is CVE-2021-3842?
CVE-2021-3842 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.50% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3842?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3842?
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Scan your code nowSource: NVD / NIST