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MEDIUM5.0

PYSEC-2026-1376

Flair allows arbitrary code execution

Quick fix

PYSEC-2026-1376 — flair: upgrade to the fixed version with the command below.

pip install --upgrade 'flair>=0.15.0'

Details

A vulnerability, which was classified as critical, was found in flairNLP flair 0.14.0. Affected is the function ClusteringModel of the file flair\models\clustering.py of the component Mode File Loader. The manipulation leads to code injection. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/flair
Introduced in: 0Fixed in: 0.15.0
Fixpip install --upgrade 'flair>=0.15.0'

References