Technology · Nltk
Nltk vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 6 vulnerabilities in Nltk: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-12372, was published on 9 August 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About Nltk
Python library for natural language processing tasks including tokenization, stemming, and parsing.
Latest Nltk vulnerabilities
- CVE-2026-12372: NLTK network URL validation permits SSRF to RFC 6598 shared-address-space hostslowCVSS 3.7EPSS 0.3%
- CVE-2026-12259: NLTK missing post-download integrity verificationmediumCVSS 6.5EPSS 0.1%
- CVE-2026-12252: NLTK arbitrary code execution in Stanford interface classeshighCVSS 7.8EPSS 0.2%
- CVE-2026-33236: NLTK path traversal in downloader componenthighCVSS 8.1EPSS 0.6%
- CVE-2026-0846: NLTK arbitrary file read in nltk.util.filestringhighCVSS 8.6EPSS 0.5%
- CVE-2021-3828: PYSEC-2021-356 - nltk is vulnerable to Inefficient Regular Expression ComplexitylowCVSS 3.1EPSS 1.7%
Most severe Nltk vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-0846: NLTK arbitrary file read in nltk.util.filestringhighCVSS 8.6EPSS 0.5%
- CVE-2026-33236: NLTK path traversal in downloader componenthighCVSS 8.1EPSS 0.6%
- CVE-2026-12252: NLTK arbitrary code execution in Stanford interface classeshighCVSS 7.8EPSS 0.2%
- CVE-2026-12259: NLTK missing post-download integrity verificationmediumCVSS 6.5EPSS 0.1%
- CVE-2026-12372: NLTK network URL validation permits SSRF to RFC 6598 shared-address-space hostslowCVSS 3.7EPSS 0.3%
- CVE-2021-3828: PYSEC-2021-356 - nltk is vulnerable to Inefficient Regular Expression ComplexitylowCVSS 3.1EPSS 1.7%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Nltk vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/nltk-nltk)<a href="https://junglewise.ai/threats/technologies/nltk-nltk"><img src="https://junglewise.ai/threats/technologies/nltk-nltk/badge.svg" alt="Nltk vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/nltk-nltk.json, and this page as text at https://junglewise.ai/threats/technologies/nltk-nltk.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Nltk vulnerabilities", https://junglewise.ai/threats/technologies/nltk-nltk, 9 November 2026.