The remote Redhat Enterprise Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:38506 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * firefox: thunderbird: Sandbox escape in the DOM: Workers component (CVE-2026-12294)

    * firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing     component (CVE-2026-12313)

    * firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing     component (CVE-2026-12311)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12290)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox     152 and Thunderbird 152 (CVE-2026-12327)

    * firefox: thunderbird: JIT miscompilation in the DOM: Core & HTML component (CVE-2026-12299)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12329)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12312)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-12302)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird     ESR 140.12, Firefox 152 and Thunderbird 152 (CVE-2026-12328)

    * firefox: thunderbird: Incorrect boundary conditions in the Internationalization component     (CVE-2026-12330)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12314)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12309)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12310)

    * firefox: thunderbird: Denial-of-service in the Graphics: ImageLib component (CVE-2026-12325)

    * firefox: thunderbird: Sandbox escape in the DOM: Navigation component (CVE-2026-12295)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-12289)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-12315)

    * firefox: thunderbird: Sandbox escape in the Security: Process Sandboxing component (CVE-2026-12296)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12306)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12307)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Networking component     (CVE-2026-12297)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12305)

    * firefox: thunderbird: Incorrect boundary conditions in the Web Audio component (CVE-2026-12292)

    * firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12308)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: CanvasWebGL component     (CVE-2026-12324)

    * firefox: thunderbird: Same-origin policy bypass in the Networking: Cookies component (CVE-2026-12304)

    * firefox: thunderbird: Use-after-free in the Networking: HTTP component (CVE-2026-12291)

    * firefox: thunderbird: Memory safety bug fixed in Firefox ESR 140.12 (CVE-2026-12298)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

Detections

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RHEL 7 : firefox (RHSA-2026:38506)

critical Nessus Plugin ID 326448

Version 1.1