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PYSEC-2026-3954

🗓️ 07 Aug 2026 07:16:26Reported by Python Packaging AdvisoryType 
pypa
 pypa
🔗 github.com👁 7 Views

Cross-package resource poisoning in nltk.downloader <= 3.9.4 via shared namespace extraction.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-12261
7 Aug 202606:25
attackerkb
circl
Circl
CVE-2026-12261
7 Aug 202608:31
circl
cve
CVE
CVE-2026-12261
7 Aug 202606:25
cve
cvelist
Cvelist
CVE-2026-12261 Improper Access Control in nltk/nltk
7 Aug 202606:25
cvelist
debiancve
Debian CVE
CVE-2026-12261
7 Aug 202606:25
debiancve
euvd
EUVD
EUVD-2026-54393
7 Aug 202606:25
euvd
nvd
NVD
CVE-2026-12261
7 Aug 202607:16
nvd
osv
OSV
DEBIAN-CVE-2026-12261
7 Aug 202607:16
osv
osv
OSV
PYSEC-2026-3954
7 Aug 202607:16
osv
osv
OSV
UBUNTU-CVE-2026-12261
7 Aug 202607:16
osv
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Vulners
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pypinltkRange03.10.0

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10 Sep 2026 12:38Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.16.5
CVSS 35.3
EPSS0.00205
SSVC
7