CVE-2026-44307 | THREATINT

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.

PUBLISHED Reserved 2026-05-05 | Published 2026-05-12 | Updated 2026-05-13 | Assigner GitHub_M

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

< 1.3.12

affected

References

github.com/...y/mako/security/advisories/GHSA-2h4p-vjrc-8xpq

github.com/sqlalchemy/mako/issues/435

github.com/...ommit/72e10c573ca0fbcbddd4455abca8ce92a61780d7

github.com/sqlalchemy/mako/releases/tag/rel_1_3_12

cve.org (CVE-2026-44307)

nvd.nist.gov (CVE-2026-44307)

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