The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-7d71f89d7e advisory.

    - Update to latest upstream (153.0)

    ----

    - New upstream release (153.0)

    ----

    - Updated to latest upstream (153.0)

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 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-6dab7a3eff advisory.

    - Update to latest upstream (153.0)

    ----

    - New upstream release (153.0)

    ----

    - Updated to latest upstream (153.0)

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

  - Clickjacking issue in the WebExtensions component in Firefox for Android. This vulnerability was fixed in     Firefox 153. (CVE-2026-16397)

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

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 153.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-68 advisory.

  - Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of     memory corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2026-16412)

  - Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was     fixed in Firefox 153 and Thunderbird 153. (CVE-2026-16367)

  - Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153,     Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16349)

  - Incorrect boundary conditions in the Audio/Video: cubeb component. This vulnerability was fixed in Firefox     153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16350)

  - Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 153, Firefox     ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16362)

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 Firefox installed on the remote Windows host is prior to 153.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-68 advisory.

  - Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of     memory corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2026-16412)

  - Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was     fixed in Firefox 153 and Thunderbird 153. (CVE-2026-16367)

  - Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153,     Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16349)

  - Incorrect boundary conditions in the Audio/Video: cubeb component. This vulnerability was fixed in Firefox     153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16350)

  - Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 153, Firefox     ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16362)

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

ID	Name	Product	Family	Published	Updated	Severity
329269	Fedora 44 : firefox (2026-7d71f89d7e)	Nessus	Fedora Local Security Checks	7/23/2026	7/31/2026	critical
329998	Fedora 43 : firefox (2026-6dab7a3eff)	Nessus	Fedora Local Security Checks	7/26/2026	7/26/2026	critical
329448	Linux Distros Unpatched Vulnerability : CVE-2026-16397	Nessus	Misc.	7/25/2026	7/25/2026	medium
328774	Mozilla Firefox < 153.0	Nessus	MacOS X Local Security Checks	7/21/2026	7/31/2026	critical
328773	Mozilla Firefox < 153.0	Nessus	Windows	7/21/2026	7/31/2026	critical

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