CVE-2026-41205: Mako is a template library written in Python

Q: How do I fix CVE-2026-41205?

mako: upgrade to 1.3.11. Exact commands for each OS are on this page.

Q: Is CVE-2026-41205 being exploited?

CVE-2026-41205 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41205 affect?

CVE-2026-41205 affects mako. Severity is high (CVSS 7.5). 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-strip

Q: How urgent is CVE-2026-41205?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2026-41205 is a high-severity flaw (CVSS 7.5) affecting mako. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 fi

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-23
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: sqlalchemy

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-23 19:17 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

sqlalchemy mako UPGRADE

Affected: < 1.3.11

Fixed in: 1.3.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mako || rpm -q mako || mako --version

2. UPGRADE to 1.3.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mako

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mako

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41205?

mako: upgrade to 1.3.11. Exact commands for each OS are on this page.

Is CVE-2026-41205 being exploited?

CVE-2026-41205 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41205 affect?

CVE-2026-41205 affects mako. Severity is high (CVSS 7.5). 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-strip

How urgent is CVE-2026-41205?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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