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PYSEC-2026-658

Mailman Sensitive Information Disclosure

Quick fix

PYSEC-2026-658 — mailman: upgrade to the fixed version with the command below.

pip install --upgrade 'mailman>=2.1.5'

Details

Mailman before 2.1.5 allows remote attackers to obtain user passwords via a crafted email request to the Mailman server.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/mailman
Introduced in: 0Fixed in: 2.1.5
Fixpip install --upgrade 'mailman>=2.1.5'

References