When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.

The remote SUSE Linux SLES15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1206-1 advisory.

    - CVE-2025-13462: incorrect parsing of TarInfo when GNU long name and type AREGTYPE are combined can lead     to       misinterpretation of tar archives (bsc#1259611).
    - CVE-2026-3644: incomplete control character validation in http.cookies can lead to input validation     bypass       (bsc#1259734).
    - CVE-2026-4224: parsing XML with deeply nested DTD content models can lead to C stack overflow     (bsc#1259735).
    - CVE-2026-4519: failure to sanitize leading dashes in URLs in the `webbrowser.open()` API can lead to web     browser       command line option injection (bsc#1260026).

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

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-22d8c9f967 advisory.

    Update to python-3.11.15, backport fixes for CVE-2026-4519, CVE-2026-3644, CVE-2026-4224, CVE-2026-2297

    ----

    Update to python-3.11.15.

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

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

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ff5da930eb advisory.

    Update to python-3.11.15, backport fixes for CVE-2026-4519, CVE-2026-3644, CVE-2026-4224, CVE-2026-2297

    ----

    Update to python-3.11.15.

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

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

The version of python installed on the remote host is prior to 2.7.18-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3218 advisory.

    The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The     Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass     input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to     BaseCookie.output(). (CVE-2026-3644)

    When an Expat parser with a registered ElementDeclHandler parses an inlinedocument type definition     containing a deeply nested content model a C stackoverflow occurs. (CVE-2026-4224)

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

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

The version of python3 installed on the remote host is prior to 3.7.16-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3217 advisory.

    The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The     Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass     input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to     BaseCookie.output(). (CVE-2026-3644)

    When an Expat parser with a registered ElementDeclHandler parses an inlinedocument type definition     containing a deeply nested content model a C stackoverflow occurs. (CVE-2026-4224)

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

Note that Nessus has not tested for these issues 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.

  - When an Expat parser with a registered ElementDeclHandler parses an inline document type definition     containing a deeply nested content model a C stack overflow occurs. (CVE-2026-4224)

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

ID	Name	Product	Family	Severity
305285	SUSE SLES15 / openSUSE 15 Security Update : python (SUSE-SU-2026:1206-1)	Nessus	SuSE Local Security Checks	high
305025	Fedora 43 : mingw-python3 (2026-22d8c9f967)	Nessus	Fedora Local Security Checks	high
305021	Fedora 42 : mingw-python3 (2026-ff5da930eb)	Nessus	Fedora Local Security Checks	high
304604	Amazon Linux 2 : python, --advisory ALAS2-2026-3218 (ALAS-2026-3218)	Nessus	Amazon Linux Local Security Checks	medium
304592	Amazon Linux 2 : python3, --advisory ALAS2-2026-3217 (ALAS-2026-3217)	Nessus	Amazon Linux Local Security Checks	medium
302535	Linux Distros Unpatched Vulnerability : CVE-2026-4224	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-4224

medium

Tenable Plugins

high

high

high

medium

medium

medium