CVE-2026-92064
Low risk· EPSS 4%Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
Sandbox escape vulnerability in the Widget: Win32 component caused by incorrect boundary conditions. Fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Risk Assessment
An attacker could exploit this to execute code outside the sandbox, potentially leading to full system compromise.
Recommendation
Update Firefox or Thunderbird to the patched version (156, 153.3, or later).
Other vulnerabilities in Mozilla Firefox / Mozilla Thunderbird
See all- CVE-2026-92065Low risk· EPSS 4%
Sandbox escape vulnerability in the Widget: Win32 component caused by incorrect boundary conditions. Fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
- CVE-2026-92060Low risk· EPSS 4%
Use-after-free in the Internationalization component of Firefox and Thunderbird. This could lead to a crash or potential code execution.
- CVE-2026-92059Low risk· EPSS 4%
Incorrect boundary conditions in the DOM: Editor component, which could lead to unexpected behavior or security bypass. Fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
- CVE-2026-92058Low risk· EPSS 4%
Use-after-free in the Graphics component, which could allow an attacker to execute code or cause a crash. Fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
- CVE-2026-92056Low risk· EPSS 4%
Use-after-free in the Graphics: Text component, which could lead to a crash or code execution. Fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
- CVE-2026-92049Low risk· EPSS 4%
Use-after-free in the Widget: Win32 component, which could allow code execution or lead to a crash. Fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Original NVD description (English source)
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.