CVE-2026-41205: Sqlalchemy Mako

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Sqlalchemy Mako: before 1.3.11 (fixed in 1.3.11)

Published 2026-04-23. Last modified 2026-06-17.