Bug 2503473 (CVE-2026-16387) - CVE-2026-16387 firefox: thunderbird: Site isolation issue in the Networking component
Summary: CVE-2026-16387 firefox: thunderbird: Site isolation issue in the Networking c...
Keywords:
Status: NEW
Alias: CVE-2026-16387
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: 2026-07-21 13:03 UTC by OSIDB Bzimport
Modified: 2026-07-23 22:49 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-07-21 13:03:38 UTC 
Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.
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