Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-f3409cf313 advisory.

    Updated to latest upstream (151.0)

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 packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-cd20332935 advisory.

    Update NSS to 3.123.1     Update to Firefox 151.0

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 version of Firefox installed on the remote macOS or Mac OS X host is prior to 151.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-46 advisory.

  - Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. 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-2026-8975)

  - Memory safety bugs present in Firefox 150. 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-2026-8973)

  - Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. 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-2026-8974)

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 151.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-46 advisory.

  - Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. 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-2026-8975)

  - Memory safety bugs present in Firefox 150. 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-2026-8973)

  - Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. 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-2026-8974)

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	Severity
315985	Fedora 44 : firefox (2026-f3409cf313)	Nessus	Fedora Local Security Checks	critical
315967	Fedora 43 : firefox / nss (2026-cd20332935)	Nessus	Fedora Local Security Checks	critical
315327	Mozilla Firefox < 151.0	Nessus	MacOS X Local Security Checks	critical
315323	Mozilla Firefox < 151.0	Nessus	Windows	critical

Detections

Analytics

CVE-2026-8945

high

Tenable Plugins

critical

critical

critical

critical