PYPI · FEBRUARY 2026 · EARLY WARNING

Critical Vulnerability in NLTK Downloader Component

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.

GHSA-7P94-766C-HGJPSeverity: CRITICAL

An early warning has been issued regarding a critical vulnerability in the NLTK downloader component, affecting all versions. This vulnerability reportedly allows attackers to execute arbitrary code, potentially leading to full system compromise.

What happened

A critical vulnerability, tracked as GHSA-7P94-766C-HGJP, has been identified in the NLTK downloader component of the nltk/nltk package. This vulnerability appears to enable arbitrary code execution, which could result in a full system compromise. The issue is under investigation, and it is recommended to upgrade to a patched version of nltk as soon as it becomes available. Additionally, review any existing code that uses nltk for potential exploitation. For more detailed information, consult the primary sources.

How 0Day mitigates this

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