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PYSEC-2026-3724

🗓️ 22 Aug 2026 15:16:19Reported by Python Packaging AdvisoryType 
pypa
 pypa
🔗 github.com👁 8 Views

Unbounded recursion in NLTK before 3.9.4 via JSONTaggedDecoder.decode_obj() enables DoS.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-66393
22 Aug 202622:00
circl
cve
CVE
CVE-2026-66393
22 Aug 202614:12
cve
cvelist
Cvelist
CVE-2026-66393 NLTK before 3.9.4 Denial of Service via JSONTaggedDecoder
22 Aug 202614:12
cvelist
debiancve
Debian CVE
CVE-2026-66393
22 Aug 202614:12
debiancve
euvd
EUVD
EUVD-2026-64310
22 Aug 202614:12
euvd
nvd
NVD
CVE-2026-66393
22 Aug 202615:16
nvd
osv
OSV
DEBIAN-CVE-2026-66393
22 Aug 202615:16
osv
osv
OSV
GHSA-RF74-V2FM-23PW Natural Language Toolkit (NLTK) has unbounded recursion in JSONTaggedDecoder.decode_obj() may cause DoS
18 Mar 202620:17
osv
ptsecurity
Positive Technologies
PT-2026-79565
22 Aug 202600:00
ptsecurity
pypa
PyPA
PYSEC-0000-CVE-2026-66393
22 Aug 202615:16
pypa
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Vulners
Node
pypinltkRange03.9.4

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27 Aug 2026 23:45Current
5.3Medium risk
Vulners AI Score5.3
CVSS 48.7
CVSS 3.17.5
EPSS0.00363
SSVC
8