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HIGH7.5

PYSEC-2026-88

Quick fix

PYSEC-2026-88 — mako: upgrade to the fixed version with the command below.

pip install --upgrade 'mako>=1.3.11'

Details

Mako is a template library written in Python. Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal when a URI starts with // (e.g., //../../../secret.txt). The root cause is an inconsistency between two slash-stripping implementations. Any file readable by the process can be returned as rendered template content when an application passes untrusted input directly to TemplateLookup.get_template(). This vulnerability is fixed in 1.3.11.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/mako
Introduced in: 0Fixed in: 1.3.11
Fixpip install --upgrade 'mako>=1.3.11'

References