CVE-2026-62388

Description

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.

Weakness classification

• disclosure@vulncheck.com: CWE-1188

Primary references

• disclosure@vulncheck.com — Exploit, Mitigation, Vendor Advisory
• disclosure@vulncheck.com — Third Party Advisory
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Mitigation, Vendor Advisory