CVE-2026-41205

EUVD-2026-25279

23.04.2026, 19:17

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.

Path Traversal

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 26%

Affected Products (NVD)

Vendor	Product	Version
sqlalchemy	mako	𝑥 < 1.3.11

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

mako

bookworm	no-dsa
bullseye	postponed
bullseye (security)	vulnerable
forky	vulnerable
sid	vulnerable
trixie	no-dsa

Amazon Linux Releases

Amazon Package

Release

python-mako

Amazon Linux 2

0:0.8.1-2.amzn2.0.2

fixed

Azure Linux Releases

Azure Package

Release

python-mako

Azure Linux 3.0

0:1.2.4-3.azl3

fixed

Common Weakness Enumeration

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References

https://github.com/sqlalchemy/mako/commit/e05ac61989a7fb9dd7dcde6cfd72dc48328719a3

https://github.com/sqlalchemy/mako/releases/tag/rel_1_3_11

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