PYSEC-2026-3789

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/nltk/PYSEC-2026-3789.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-3789
Aliases
Published
2026-08-22T15:16:18.700Z
Modified
2026-09-03T11:00:04.971435908Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

NLTK versions before 3.10.2 contain a symlink-based sandbox bypass in FramenetCorpusReader that allows attackers to read arbitrary XML files outside the corpus root. Attackers can place symlinks with names containing no path separators inside the corpus subdirectory, which pass the path validation guard and are resolved to files outside the intended corpus root when accessed via framebyname(), lufile(), or doc() methods.

References

Affected packages

PyPI / nltk

Package

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.10.0
Fixed
3.10.2

Affected versions

3.*
3.10.0
3.10.1

Database specific

source
"https://github.com/pypa/advisory-database/blob/main/vulns/nltk/PYSEC-2026-3789.yaml"