—
PYSEC-2026-3731
Quick fix
PYSEC-2026-3731 — nltk: upgrade to the fixed version with the command below.
pip install --upgrade 'nltk>=3.10.0'Details
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.
Are you affected?
Enter the version of the package you're using.