Lucene search
+L

CVE-2026-66393 NLTK before 3.9.4 Denial of Service via JSONTaggedDecoder

🗓️ 22 Aug 2026 14:12:42Reported by VulnCheckType 
cvelist
 cvelist
🔗 www.cve.org👁 5 Views

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

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-66393
22 Aug 202614:12
cve
euvd
EUVD
EUVD-2026-64310
22 Aug 202614:12
euvd
nvd
NVD
CVE-2026-66393
22 Aug 202615:16
nvd
ptsecurity
Positive Technologies
PT-2026-79565
22 Aug 202600:00
ptsecurity
[
  {
    "vendor": "nltk",
    "product": "nltk",
    "defaultStatus": "unaffected",
    "packageURL": "pkg:pypi/nltk",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "versionType": "semver",
        "lessThan": "3.9.4"
      },
      {
        "version": "3.9.4",
        "status": "unaffected",
        "versionType": "semver"
      }
    ]
  }
]

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation