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VULNERABILITIES

CVE-2026-65915 Details

Description

NLTK versions before 3.10.0 contain a logic bug in FileSystemPathPointer.open() where the sandbox validation check compares a normalized path against itself, making the security check permanently inert. Attackers can pass file:// URLs to nltk.data.load() to read arbitrary files accessible to the process user, including credentials and configuration files.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9 CISA-ADPExploitVendor Advisory
https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9 [email protected]ExploitVendor Advisory
https://www.vulncheck.com/advisories/nltk-before-arbitrary-file-read-via-filesystempathpointer [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-284Improper Access Control[email protected]

Affected Products

ProductVersions
nltk nltk
< 3.10.0

CPE

  • cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-65915
NVD Published Date:
Aug 22, 2026
NVD Last Modified:
Aug 31, 2026
Source:
[email protected]
CVE-2026-65915 Details - Not Deferred