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CVE-2026-12259

🗓️ 03 Aug 2026 08:17:00Reported by ubuntu.comType 
ubuntucve
 ubuntucve
🔗 ubuntu.com👁 14 Views

nltk 3.9.4 writes package bytes to disk before checksum validation, allowing tampered downloads.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-12259
3 Aug 202607:09
–attackerkb
circl
Circl
CVE-2026-12259
8 Sep 202616:35
–circl
cve
CVE
CVE-2026-12259
3 Aug 202607:09
–cve
cvelist
Cvelist
CVE-2026-12259 Improper Input Validation in nltk/nltk
3 Aug 202607:09
–cvelist
debiancve
Debian CVE
CVE-2026-12259
3 Aug 202607:09
–debiancve
euvd
EUVD
EUVD-2026-52226
8 Sep 202615:27
–euvd
github
Github Security Blog
NLTK: Missing Post-Download Integrity Verification Allows Malicious Package Injection
8 Sep 202615:27
–github
github
Github Security Blog
Duplicate Advisory: NLTK: Missing Post-Download Integrity Verification Allows Malicious Package Injection
3 Aug 202609:32
–github
mend
Mend
CVE-2026-12259
3 Aug 202607:09
–mend
nvd
NVD
CVE-2026-12259
3 Aug 202608:17
–nvd
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Ubuntu14.04allnltk0nltk_0_all.deb
Ubuntu18.04allnltk0nltk_0_all.deb
Ubuntu20.04allnltk0nltk_0_all.deb
Ubuntu22.04allnltk0nltk_0_all.deb
Ubuntu24.04allnltk0nltk_0_all.deb
Ubuntu26.04allnltk0nltk_0_all.deb
Ubuntu16.04allnltk0nltk_0_all.deb

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07 Aug 2026 16:53Current
6.1Medium risk
Vulners AI Score6.1
CVSS 35.3
EPSS0.0014
SSVC
14