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.

An update of the python3 package has been released.

The version of python-mako installed on the remote host is prior to 0.8.1-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3333 advisory.

    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. (CVE-2026-41205)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:1820-1 advisory.

    This update for python-Mako fixes the following issue:

    - CVE-2026-41205: Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal     (bsc#1262716).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:1819-1 advisory.

    This update for python-Mako fixes the following issue:

    - CVE-2026-41205: Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal     (bsc#1262716).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8234-1 advisory.

    It was discovered that Mako incorrectly handled URIs with double-slash prefixes in TemplateLookup. A     remote attacker could possibly use this issue to obtain sensitive information.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:21426-1 advisory.

    This update for python-Mako fixes the following issue:

    - CVE-2026-41205: Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal     (bsc#1262716).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:20645-1 advisory.

    This update for python-Mako fixes the following issue:

    - CVE-2026-41205: Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal     (bsc#1262716).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-41205)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
321579	Photon OS 5.0: Python3 PHSA-2026-5.0-0882	Nessus	PhotonOS Local Security Checks	high
321397	Photon OS 4.0: Python3 PHSA-2026-4.0-1018	Nessus	PhotonOS Local Security Checks	high
319856	Amazon Linux 2 : python-mako, --advisory ALAS2-2026-3333 (ALAS-2026-3333)	Nessus	Amazon Linux Local Security Checks	high
315052	SUSE SLES15 Security Update : python-Mako (SUSE-SU-2026:1820-1)	Nessus	SuSE Local Security Checks	high
315051	SUSE SLED15 / SLES15 Security Update : python-Mako (SUSE-SU-2026:1819-1)	Nessus	SuSE Local Security Checks	high
312648	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : Mako vulnerability (USN-8234-1)	Nessus	Ubuntu Local Security Checks	high
312125	SUSE SLES16 Security Update : python-Mako (SUSE-SU-2026:21426-1)	Nessus	SuSE Local Security Checks	high
311763	openSUSE 16 Security Update : python-Mako (openSUSE-SU-2026:20645-1)	Nessus	SuSE Local Security Checks	high
310039	Linux Distros Unpatched Vulnerability : CVE-2026-41205	Nessus	Misc.	high

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