nltk: A vulnerability in the `filestring()` function of the `nltk.util` module in nltk version 3.9.2 allows arbitrary file...
CVE-2026-0846 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-0846, released March 9, 2026. It is not reported as exploited. Patch Radar priority: High.
A vulnerability in the `filestring()` function of the `nltk.util` module in nltk version 3.9.2 allows arbitrary file read due to improper validation of input paths. The function directly opens files specified by user input without sanitization, enabling attackers to access sensitive system files by providing absolute paths or traversal paths. This vulnerability can be exploited locally or remotely, particularly in scenarios where the function is used in web APIs or other interfaces that accept user-supplied input.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nltk · Debian 14 | 3.9.3-1 | DEBIAN-CVE-2026-0846 | Mar 9, 2026 |
| python-nltk · Ubuntu 18.04.6 LTS (bionic) | 3.2.5-1ubuntu0.1+esm4 | python-nltk 3.2.5-1ubuntu0.1+esm4 | Mar 20, 2026 |
| python3-nltk · Ubuntu 18.04.6 LTS (bionic) | 3.2.5-1ubuntu0.1+esm4 | python3-nltk 3.2.5-1ubuntu0.1+esm4 | Mar 20, 2026 |
| python3-nltk · Ubuntu 20.04 LTS (focal) | 3.4.5-2ubuntu0.1~esm4 | python3-nltk 3.4.5-2ubuntu0.1~esm4 | Mar 20, 2026 |
| python3-nltk · Ubuntu 22.04.1 LTS (jammy) | 3.7-1ubuntu0.1~esm2 | python3-nltk 3.7-1ubuntu0.1~esm2 | Mar 20, 2026 |
| python3-nltk · Ubuntu 24.04.5 LTS (noble) | 3.8.1-1ubuntu0.1~esm2 | python3-nltk 3.8.1-1ubuntu0.1~esm2 | Mar 20, 2026 |
| python3-nltk · Ubuntu 26.04.1 LTS (resolute) | 3.9.2-1ubuntu0.1~esm2 | python3-nltk 3.9.2-1ubuntu0.1~esm2 | Mar 20, 2026 |
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