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OpenAdvisories
High RLSA-2026:47101 32 CVEs

Important: firefox security update

Published Jul 30, 2026 · Updated Jul 30, 2026

Ecosystem: Rocky Linux

Summary

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

Security Fix(es):

* firefox: thunderbird: Site isolation issue in the DOM: Navigation component (CVE-2026-15719)

* firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-15718)

* firefox: thunderbird: Mitigation bypass in the Enterprise Policies component (CVE-2026-16390)

* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: cubeb component (CVE-2026-16350)

* firefox: thunderbird: Information disclosure in the Storage: IndexedDB component (CVE-2026-16391)

* firefox: thunderbird: Site isolation issue in the Networking: HTTP component (CVE-2026-16375)

* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-16356)

* firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-16363)

* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.13 and Firefox 153 (CVE-2026-16412)

* firefox: thunderbird: Same-origin policy bypass in the Networking: DNS component (CVE-2026-16381)

* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-16355)

* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13 (CVE-2026-16361)

* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-16352)

* firefox: thunderbird: Incorrect boundary conditions in the JavaScript: WebAssembly component (CVE-2026-16368)

* firefox: thunderbird: Mitigation bypass in the PDF Viewer component (CVE-2026-16377)

* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153 (CVE-2026-16360)

* firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component (CVE-2026-16362)

* firefox: thunderbird: Site isolation issue in the Graphics: WebRender component (CVE-2026-16358)

* firefox: thunderbird: Site isolation issue in the Networking component (CVE-2026-16387)

* firefox: thunderbird: Same-origin policy bypass in the DOM: Navigation component (CVE-2026-16349)

* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-16357)

* firefox: thunderbird: Sandbox escape due to use-after-free in the DOM: Navigation component (CVE-2026-16351)

* firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-16371)

* firefox: thunderbird: Privilege escalation in the DOM: Content Processes component (CVE-2026-16379)

* firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-16354)

* firefox: thunderbird: Information disclosure in the Framework component in DevTools (CVE-2026-16374)

* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-16359)

* firefox: thunderbird: Mitigation bypass in the DOM: Networking component (CVE-2026-16383)

* firefox: thunderbird: Integer overflow in the JavaScript: WebAssembly component (CVE-2026-16369)

* firefox: thunderbird: Invalid pointer in the DOM: Bindings (WebIDL) component (CVE-2026-16353)

* firefox: thunderbird: Privilege escalation in WebExtensions (CVE-2026-16396)

* firefox: thunderbird: Information disclosure in the Networking: WebSockets component (CVE-2026-16405)

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.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 10 firefox 0:140.13.0-1.el10_2

Vulnerabilities 32

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2503432
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503501
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503473
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503472
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503456
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2503423
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503425
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503497
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503430
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503451
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503440
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503463
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503517
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503489
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503505
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503439
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503513
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503444
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    https://bugzilla.redhat.com/show_bug.cgi?id=2499974
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503434
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503454
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503420
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503416
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2499973
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503527
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503521
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503491
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503512
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503500
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503498
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    https://bugzilla.redhat.com/show_bug.cgi?id=2503415
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2503485