Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
- firefox: Spoofing issue in the Downloads Panel component (CVE-2025-14327)
- firefox: Use-after-free in the JavaScript: GC component (CVE-2026-0885)
- firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147 (CVE-2026-0891)
- firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-0878)
- firefox: Use-after-free in the IPC component (CVE-2026-0882)
- firefox: Use-after-free in the JavaScript Engine component (CVE-2026-0884)
- firefox: Information disclosure in the Networking component (CVE-2026-0883)
- firefox: Mitigation bypass in the DOM: Security component (CVE-2026-0877)
- firefox: Spoofing issue in the DOM: Copy & Paste and Drag & Drop component (CVE-2026-0890)
- firefox: Clickjacking issue, information disclosure in the PDF Viewer component (CVE-2026-0887)
- firefox: Sandbox escape due to incorrect boundary conditions in the Graphics component (CVE-2026-0879)
- firefox: Sandbox escape due to integer overflow in the Graphics component (CVE-2026-0880)
- firefox: Incorrect boundary conditions in the Graphics component (CVE-2026-0886)
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.