Issued at: 2026-06-04
Updated at: 2026-06-04
Synopsis
Important: firefox security update
Description
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
* firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
* firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
* firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
* firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
* firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
* firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
* firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
* firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
* firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
* firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
* firefox: Privilege escalation in the Security component (CVE-2026-8970)
* firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
* firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
* firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
* firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
* firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
* firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
* firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)
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.