libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

The version of thunderbird installed on the remote host is prior to 140.10.1-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3306 advisory.

    libexpat before 2.7.6 uses insufficient entropy, and thus hash flooding can occur via a crafted XML     document. (CVE-2026-41080)

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 version of firefox installed on the remote host is prior to 140.10.1-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2FIREFOX-2026-059 advisory.

    libexpat before 2.7.6 uses insufficient entropy, and thus hash flooding can occur via a crafted XML     document. (CVE-2026-41080)

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 Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-163d1fe6c0 advisory.

    Update to expat-2.8.1.

Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-9cf92027ec advisory.

    Update to expat-2.8.1.

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

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

An update of the expat package has been released.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1706 advisory.

    libexpat before 2.7.6 uses insufficient entropy, and thus hash flooding can occur via a crafted XML     document. (CVE-2026-41080)

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 version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 88440f1d-4168-11f1-95f7-00a098b42aeb advisory.

    https://github.com/libexpat/libexpat/pull/1183 reports:
    libexpat before 2.8.0 uses insufficient entropy, and thus hash               flooding can occur via a crafted XML document.

Tenable has extracted the preceding description block directly from the FreeBSD 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.

  - libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML     document. (CVE-2026-41080)

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

ID	Name	Product	Family	Severity
317031	Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3306 (ALAS-2026-3306)	Nessus	Amazon Linux Local Security Checks	high
316996	Amazon Linux 2 : firefox, --advisory ALAS2FIREFOX-2026-059 (ALASFIREFOX-2026-059)	Nessus	Amazon Linux Local Security Checks	high
315969	Fedora 44 : mingw-expat (2026-163d1fe6c0)	Nessus	Fedora Local Security Checks	high
315964	Fedora 43 : mingw-expat (2026-9cf92027ec)	Nessus	Fedora Local Security Checks	high
315097	Photon OS 4.0: Expat PHSA-2026-4.0-1013	Nessus	PhotonOS Local Security Checks	high
315017	Amazon Linux 2023 : firefox (ALAS2023-2026-1706)	Nessus	Amazon Linux Local Security Checks	high
313506	Photon OS 5.0: Expat PHSA-2026-5.0-0843	Nessus	PhotonOS Local Security Checks	high
310391	FreeBSD : (lib)expat -- Insufficient entropy (88440f1d-4168-11f1-95f7-00a098b42aeb)	Nessus	FreeBSD Local Security Checks	high
306845	Linux Distros Unpatched Vulnerability : CVE-2026-41080	Nessus	Misc.	high

Detections

Analytics

CVE-2026-41080

high

Tenable Plugins

high

high

high

high

high

high

high

high

high