CVE-2026-62388 HIGH

CVE-2026-62388: NLTK before 3.10.0 Insecure Default Configuration in pathsec.py

Vendor Nltk
Product nltk
Weakness CWE-1188
Published August 22, 2026
Last update August 29, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

NLTK versions before 3.10.0 default to ENFORCE=False in pathsec.py, causing all security validation functions to emit warnings instead of raising exceptions. Attackers can bypass path traversal and pickle deserialization protections by exploiting the disabled security controls that are only active when manually enabled.

Key dates

02Disclosure timeline

August 22, 2026 CVE published
August 29, 2026 Record updated