CVE-2026-41205

Name	CVE-2026-41205
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1134729

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mako (PTS)	bullseye	1.1.3+ds1-2	vulnerable
	bullseye (security)	1.1.3+ds1-2+deb11u1	vulnerable
	bookworm	1.2.4+ds-1	vulnerable
	trixie	1.3.9-1	vulnerable
	forky, sid	1.3.10-3	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
mako	source	(unstable)	(unfixed)			1134729

https://github.com/sqlalchemy/mako/security/advisories/GHSA-v92g-xgxw-vvmm