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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-41205

26
FAUCET Score

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.

First published: Apr 23, 2026Last modified: May 20, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.11CPE matchmatch criteria
cpe:2.3:a:sqlalchemy:mako:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

7.7HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 9th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

microsoftpatch availablevia msrc
Product: 21311-17084Fixed in: 1.2.4-3
microsoftpatch availablevia msrc
Product: azl3 python-mako 1.2.4-3 on Azure Linux 3.0Fixed in: 1.2.4-3
microsoftpatch availablevia msrc
Product: azl3 python-mako 1.2.4-2 on Azure Linux 3.0Fixed in: 1.2.4-3
microsoftpatch availablevia msrc
Product: 21238-17084Fixed in: 1.2.4-3
pippatch availablevia ghsa
Product: MakoFixed in: 1.3.11
ubuntupatch availablevia ubuntu_usn
Product: mako (focal)Fixed in: 1.1.0+ds1-1ubuntu2.1+esm1
ubuntupatch availablevia ubuntu_usn
Product: mako (jammy)Fixed in: 1.1.3+ds1-2ubuntu0.2
ubuntupatch availablevia ubuntu_usn
Product: mako (noble)Fixed in: 1.3.2-1ubuntu0.1
ubuntupatch availablevia ubuntu_usn
Product: mako (questing)Fixed in: 1.3.9-1ubuntu0.1
ubuntupatch availablevia ubuntu_usn
Product: mako (resolute)Fixed in: 1.3.10-3ubuntu0.1
ubuntupatch availablevia ubuntu_usn
Product: mako (xenial)Fixed in: 1.0.3+ds1-1ubuntu1+esm2
ubuntupatch availablevia ubuntu_usn
Product: mako (bionic)Fixed in: 1.0.7+ds1-1ubuntu0.2+esm1
github_advisoryworkaround availablevia nvd_reference
View patch

Vendor Advisories (3)

ubuntuUSN-8234-1

Mako vulnerability

May 5, 2026
pipGHSA-v92g-xgxw-vvmmhigh

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

Apr 16, 2026
microsoft2026-Apr/CVE-2026-41205Important

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

Apr 14, 2026

References

github.com / sqlalchemy/mako/commit/e05ac61989a7fb9dd7dcde6cfd72dc48328719a3
github.com / sqlalchemy/mako/releases/tag/rel_1_3_11
github.com / sqlalchemy/mako/security/advisories/GHSA-v92g-xgxw-vvmm
MitigationVendor Advisory