CVE-2026-44307

EUVD-2026-29867
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitHub_MCNA
8.7 HIGH
NETWORK
LOW
NONE
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 45.86%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
sqlalchemymako
𝑥
< 1.3.12
CNA
Debian logo
Debian Releases
Debian Product
Codename
mako
bookworm
1.2.4+ds-1
fixed
bullseye
1.1.3+ds1-2
fixed
bullseye (security)
1.1.3+ds1-2+deb11u1
fixed
forky
1.3.10-3
fixed
sid
1.3.10-3
fixed
trixie
1.3.9-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mako
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
Common Weakness Enumeration
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