CVE-2026-44307

Description

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.

References

• https://github.com/sqlalchemy/mako/commit/72e10c573ca0fbcbddd4455abca8ce92a61780d7
• https://github.com/sqlalchemy/mako/issues/435
• https://github.com/sqlalchemy/mako/releases/tag/rel_1_3_12
• https://github.com/sqlalchemy/mako/security/advisories/GHSA-2h4p-vjrc-8xpq