CVE-2026-33236
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, the NLTK downloader does not validate the `subdir` and `id` attributes when processing remote XML index files. Attackers can control a remote XML index server to provide malicious values containing path traversal sequences (such as `../`), which can lead to arbitrary directory creation, arbitrary file creation, and arbitrary file overwrite. Commit 89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a patches the issue.
- Nltk
- ≤ 3.9.3
- Fix
- Available
- CVSS 3.1
- 8.1 HIGH
- EPSS
- 0.6% (44th percentile)
- Weakness
- CWE-22
- NVD status
- Modified
- Published
- 2026-03-20
No indexed exploits for CVE-2026-33236 yet
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