Bug 2550404 (CVE-2026-109740) - CVE-2026-109740 firefox: firefox: Sandbox escape via incorrect boundary conditions in Win32 widget
Summary: CVE-2026-109740 firefox: firefox: Sandbox escape via incorrect boundary condi...
Keywords:
Status: NEW
Alias: CVE-2026-109740
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-13 12:54 UTC by OSIDB Bzimport
Modified: 2026-10-13 18:01 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-10-13 12:54:43 UTC 
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.
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