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.
References
| Link | Resource |
|---|---|
| https://github.com/nltk/nltk/commit/89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a | Patch |
| https://github.com/nltk/nltk/security/advisories/GHSA-469j-vmhf-r6v7 | Exploit Vendor Advisory |
Configurations
History
23 Mar 2026, 19:15
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:* | |
| First Time |
Nltk nltk
Nltk |
|
| References | () https://github.com/nltk/nltk/commit/89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a - Patch | |
| References | () https://github.com/nltk/nltk/security/advisories/GHSA-469j-vmhf-r6v7 - Exploit, Vendor Advisory |
20 Mar 2026, 23:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-03-20 23:16
Updated : 2026-03-23 19:15
NVD link : CVE-2026-33236
Mitre link : CVE-2026-33236
CVE.ORG link : CVE-2026-33236
JSON object : View
Products Affected
nltk
- nltk
CWE
CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')