Bug 2479861 (CVE-2026-8959) - CVE-2026-8959 firefox: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
Summary: CVE-2026-8959 firefox: Sandbox escape due to incorrect boundary conditions in...
Keywords:
Status: NEW
Alias: CVE-2026-8959
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-19 14:02 UTC by OSIDB Bzimport
Modified: 2026-05-21 19:49 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-05-19 14:02:53 UTC 
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.
Note You need to log in before you can comment on or make changes to this bug.