CVE-2026-41205CWE-22

Mako: Path traversal via double-slash URI prefix in TemplateLookup

High · published April 23, 2026

CVSS v4.0
7.7
EPSS
1%
Percentile
44.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.7 · HIGH
Vector
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/E:P
EPSS
0.00530 · 44.0th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-04-23T18:52Z
EPSS history
Timeline
  • 23 APR 18:52Z
    Mako: Path traversal via double-slash URI prefix in TemplateLookup
    cvelistv5