An integer overflow was present in `OrderedHashTable` used by the JavaScript engine This vulnerability affects Firefox < 139.0.4.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the b704d4b8-4b87-11f0-9605-b42e991fc52e advisory.

    security@mozilla.org reports:
    CVE-2025-49709: Certain canvas operations could have lead               to memory corruption.
    CVE-2025-49710: An integer overflow was present in               `OrderedHashTable` used by the JavaScript engine.

Tenable has extracted the preceding description block directly from the FreeBSD 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 Windows host is prior to 139.0.4. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-47 advisory.

  - An integer overflow was present in <code>OrderedHashTable</code> used by the JavaScript engine     (CVE-2025-49710)

  - Certain canvas operations could have lead to memory corruption. (CVE-2025-49709)

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 139.0.4. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-47 advisory.

  - An integer overflow was present in <code>OrderedHashTable</code> used by the JavaScript engine     (CVE-2025-49710)

  - Certain canvas operations could have lead to memory corruption. (CVE-2025-49709)

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
240167	FreeBSD : Firefox -- Multiple vulnerabilities (b704d4b8-4b87-11f0-9605-b42e991fc52e)	Nessus	FreeBSD Local Security Checks	critical
238072	Mozilla Firefox < 139.0.4	Nessus	Windows	critical
238071	Mozilla Firefox < 139.0.4	Nessus	MacOS X Local Security Checks	critical

Detections

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CVE-2025-49710

critical

Tenable Plugins

critical

critical

critical