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AlmaLinux · Security advisory · November 7, 2026
AlmaLinux · Security advisory · November 7, 2026ALSA-2026:89758: firefox security update
ALSA-2026:89758, released November 7, 2026, fixes 29 CVEs in firefox (version 153.5.0-1.el10_2). None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
29
3 rated Critical
Exploited
0
None reported
Highest CVSS
9.6
Base score, 0 to 10
Highest EPSS
0.0048
41st percentile
Priority of the 29 CVEs
Patch now 0
Urgent 3
High 26
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| firefox | almalinux 10 | 153.5.0-1.el10_2 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-109708 | firefox-esr: Sandbox escape due to incorrect boundary conditions in the Networking component | 9.6 | 0.0033 | None reported |
| Urgent | CVE-2026-109705 | thunderbird: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component | 9.6 | 0.0033 | None reported |
| Urgent | CVE-2026-109707 | firefox-esr: Sandbox escape due to use-after-free in the Networking component | 9.6 | 0.0033 | None reported |
| High | CVE-2026-45186 | In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input. | 8.2 | 0.0048 | None reported |
| High | CVE-2026-109704 | firefox: Privilege escalation in the Application Update component | 8.2 | 0.0041 | None reported |
| High | CVE-2026-109730 | thunderbird: Integer overflow in the Graphics component | 8.8 | 0.0037 | None reported |
| High | CVE-2026-109740 | firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Secu... | 8.2 | 0.0035 | None reported |
| High | CVE-2026-109709 | thunderbird: Information disclosure, privilege escalation in the Security: Process Sandboxing component | 8.8 | 0.0033 | None reported |
| High | CVE-2026-77214 | libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer | 8.2 | 0.0032 | None reported |
| High | CVE-2026-109715 | firefox-esr: Incorrect boundary conditions in the JavaScript Engine component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-109716 | firefox-esr: Incorrect boundary conditions in the JavaScript Engine component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-109722 | firefox-esr: JIT miscompilation in the JavaScript Engine: JIT component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-109721 | firefox-esr: Incorrect boundary conditions in the JavaScript Engine: JIT component | 8.8 | 0.0028 | None reported |
| High | CVE-2026-109720 | firefox-esr: JIT miscompilation in the JavaScript: WebAssembly component | 8.8 | 0.0026 | None reported |
| High | CVE-2026-109729 | thunderbird: Use-after-free in the JavaScript Engine: JIT component | 8.2 | 0.0024 | None reported |
| High | CVE-2026-109732 | thunderbird: Use-after-free in the DOM: Streams component | 8.2 | 0.0024 | None reported |
| High | CVE-2026-109718 | thunderbird: Use-after-free in the XML component | 8.8 | 0.0023 | None reported |
| High | CVE-2026-109725 | thunderbird: Use-after-free in the DOM: Core & HTML component | 8.8 | 0.0023 | None reported |
| High | CVE-2026-109728 | thunderbird: Use-after-free in the DOM: Animation component | 8.8 | 0.0023 | None reported |
| High | CVE-2026-109706 | thunderbird: Use-after-free in the Storage: IndexedDB component | 8.2 | 0.0023 | None reported |
| High | CVE-2026-109726 | thunderbird: Use-after-free in the SVG component | 8.2 | 0.0023 | None reported |
| High | CVE-2026-109727 | thunderbird: Use-after-free in the Audio/Video component | 8.2 | 0.0023 | None reported |
| High | CVE-2026-109712 | firefox-esr: Sandbox escape due to uninitialized memory in the Graphics component | 8.8 | 0.0022 | None reported |
| High | CVE-2026-109711 | thunderbird: Use-after-free in the Graphics: Canvas2D component | 8.8 | 0.0022 | None reported |
| High | CVE-2026-109713 | thunderbird: Use-after-free in the Crash Reporting component | 8.8 | 0.0022 | None reported |
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