Path Sandbox Bypass in NLTK by NLTK Developers
CVE-2026-79674

8.8HIGH

Key Information:

Vendor

Nltk

Status
Nltk
Vendor
CVE Published:
25 August 2026

What is CVE-2026-79674?

Versions of NLTK prior to 3.10.3 are susceptible to a path sandbox bypass vulnerability. This flaw exists within the corpus-reader constructors, such as LinThesaurusCorpusReader and PanLexLiteCorpusReader, allowing attackers to supply arbitrary paths as corpus root. Consequently, this enables unauthorized access to filesystem content and SQLite databases beyond the pathsec sandbox, which compromises the integrity and security of the system.

Affected Version(s)

nltk 0 < 3.10.3

nltk 3.10.3

References

https://github.com/nltk/nltk/security/advisories/GHSA-3gq...
vendor-advisory
https://www.vulncheck.com/advisories/nltk-path-traversal-...
third-party-advisory

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

nguyencanhthuong
.