Known Vulnerability
The current version has a known security vulnerability. Review the advisory and consider upgrading.
Security Vulnerability
PYSEC-2026-597
Source: osv.dev · Flagged: 6 days ago
Security Vulnerability
High
GHSA-p4gq-832x-fm9v
Natural Language Toolkit (NLTK): URL-Encoded Path Traversal in nltk.data.load() Allows Arbitrary Local File Read
Source: osv.dev · Flagged: 3 weeks ago
nltk has 70.4M monthly downloads and 15K GitHub stars. Version 3.9.4 supports Python 3.10+, first published in 2009.
It is actively maintained under a permissive license, last released in Mar 2026.
It is built on top of click, joblib and regex. It is used by 2,621 tracked packages, including llama-index-core, llama-index and safety.
GitHub topics include nltk, nlp and natural-language-processing.
Package Insights
Package Risks
- No releases in 101 days despite active commits
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
88
Adoption
80
Community
90
Provenance
0
How the maintenance status was determined
Last commit
2 days ago
Monthly downloads
70,361,905
•
Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
70,361,905
Stars
14,659
Stars per 1k downloads
0.21
•
Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
2,391,323
Month daily avg
2,345,397
Momentum
+2.0%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.10
Cutting Edge
Minimum supported version is 3.12 or newer
•
Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
Apache License, Version 2.0
•
Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
104 days ago
Total releases
56
Releases/year
3.3
Rapid
Last release within 365 days and > 12 releases/year
•
Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
437
Monthly downloads
70,361,905
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
•
Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
75
Issue Burden
16.4
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
14.5%
contrib / forks
Stale Release
101d
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
1.3M
Windows
27.4K
macOS
14.3K
Python Versions
3.12
38.1%
488.4K
3.10
24.9%
318.7K
3.11
21.6%
276.4K
3.13
12.4%
158.3K
3.14
3.0%
39.0K
Top Countries
1.
US
1.4M
US
2.
DK
82.6K
DK
3.
DE
30.0K
DE
4.
IE
27.9K
IE
5.
IN
26.3K
IN
6.
JP
20.4K
JP
7.
NL
19.4K
NL
8.
SE
19.0K
SE
9.
SG
17.1K
SG
10.
GB
15.2K
GB
Dependencies
4
16 optional dependencies
- matplotlib[plot]
- matplotlib[all]
- numpy[all]
- numpy[machine-learning]
- pyparsing[tgrep]
- pyparsing[all]
- python-crfsuite[all]
- python-crfsuite[machine-learning]
- requests[all]
- requests[corenlp]
- scikit-learn[machine-learning]
- scikit-learn[all]
- scipy[all]
- scipy[machine-learning]
- twython[all]
- twython[twitter]
Used By
2621
- llama-index-core
- llama-index
- safety
- textblob
- airbyte-cdk
- llama-index-legacy
- crawl4ai
- open-webui
- evidently
- textstat
- whisperx
- pipecat-ai
- label-studio-sdk
- newspaper3k
- g2p-en
- pinecone-text
- rake-nltk
- azure-ai-evaluation
- open-interpreter
- llm-guard
- textarena
- autogluon-multimodal
- llmlingua
- agent-lifecycle-toolkit
- letta
- sumy
- sae-lens
- gem-llm
- tts
- gpt-researcher
- demisto-sdk
- ms-swift
- textattack
- keyphrase-vectorizers
- allennlp-pvt-nightly
- garak
- graphrag
- bddl
- karaoke-gen
- chem
- docassemble-base
- defeatbeta-api
- ingredient-parser-nlp
- langroid
- trinitty
- letta-nightly
- querysource
- os-sys
- pyplexity
- evalscope
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
Apache License, Version 2.0
First Release
July 15, 2009
Last Release
3 months ago
Last Commit
3 days ago
Latest Version
3.9.4
Total Releases
56
Contributors
437
Open PRs
23
Archived
No
Author
NLTK Team
Python Versions
3.10
3.11
3.12
3.13
3.14
Wheels
py3
Keywords
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh