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Fencer Vulns
high 7.5

CVE-2026-41205 json

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

published 2026-04-16 6 mo ago modified 2026-10-26 13 d ago also GHSA-v92g-xgxw-vvmm , PYSEC-2026-88 , EUVD-2026-25279

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi mako 1.3.11
  • sqlalchemy mako 1.3.11
  • mako Ubuntu 22.04 LTS 1.1.3+ds1-2ubuntu0.2
  • mako Ubuntu 24.04 LTS 1.3.2-1ubuntu0.1
  • mako Ubuntu 25.10 1.3.9-1ubuntu0.1
  • mako Ubuntu 26.04 LTS 1.3.10-3ubuntu0.1
  • mako Ubuntu Pro 16.04 LTS 1.0.3+ds1-1ubuntu1+esm2
  • mako Ubuntu Pro 18.04 LTS 1.0.7+ds1-1ubuntu0.2+esm1
  • mako Ubuntu Pro 20.04 LTS 1.1.0+ds1-1ubuntu2.1+esm1

ubuntu advisories UBUNTU-CVE-2026-41205

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python-Mako openSUSE Tumbleweed 1.3.11-1.1

opensuse advisories openSUSE-SU-2026:10616-1

  • python-mako Azure Linux 3.0 1.2.4-3

azure linux advisories AZL-83606

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41205 updated cvss 5.9

mako: Mako: Information disclosure via path traversal vulnerability

  • Red Hat Migration Toolkit for Applications 8 mta/mta-solution-server-rhel9 Red Hat Enterprise Linux 8 resource-agents, resource-agents-gcp, resource-agents-paf, resource-agents-aliyun Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-training-cuda128-torch29-py312-rhel9 Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9 Red Hat Satellite 6 satellite/iop-host-inventory-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.7 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
CNA 4.0 7.7 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi mako
<1.3.11
1.3.11

Affected products

  • sqlalchemy mako

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.