CVE-2026-44307: Sqlalchemy Mako

High severity, CVSS 8.7. EPSS: 0.9% chance of exploitation in the next 30 days.

Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal (e.g. \..\..\ secret.txt) bypasses the directory traversal check in Template.__init__ and the posixpath-based normalization in TemplateLookup.get_template(), allowing reads of files outside the configured template directory. This vulnerability is fixed in 1.3.12.

Affected products

• Sqlalchemy Mako: before 1.3.12 (fixed in 1.3.12)

Published 2026-05-12. Last modified 2026-06-17.