The vulnerability of the `nltk.downloader.Downloader.download` and `nltk.downloader.Downloader.incr_download` components of the NLTK library, which are used for symbolic and statistical processing of natural language, allows attackers to bypass existing security mechanisms and gain access to write and delete any files they desire.
🗓️ 01 Sep 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 2 Views
| Reporter | Title | Published | Views | Family All 20 |
|---|---|---|---|---|
 | CVE-2026-81727 | 2 Sep 202616:35 | – | circl |
 | CVE-2026-81727 | 27 Aug 202614:51 | – | cve |
 | CVE-2026-81727 NLTK before 3.10.3 Hardlink File Overwrite via downloader | 27 Aug 202614:51 | – | cvelist |
 | CVE-2026-81727 | 27 Aug 202614:51 | – | debiancve |
 | EUVD-2026-67077 | 2 Sep 202614:35 | – | euvd |
 | Duplicate Advisory: Downloader.download follows hardlinks and overwrites outside-root files | 27 Aug 202618:32 | – | github |
| NLTK: Downloader.download follows hardlinks and overwrites outside-root files | 2 Sep 202614:35 | – | github |
 | CVE-2026-81727 | 27 Aug 202617:21 | – | nvd |
 | DEBIAN-CVE-2026-81727 | 27 Aug 202617:21 | – | osv |
| ECHO-D083-FBC5-4389 | 3 Sep 202600:00 | – | osv |
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01 Sep 2026 00:00Current
6Medium risk
Vulners AI Score6
CVSS 26.2
CVSS 37.1
EPSS0.00135