Bug 2517845 (CVE-2026-74960) - CVE-2026-74960 firefox: thunderbird: Site isolation issue in the WebExtensions component
Summary: CVE-2026-74960 firefox: thunderbird: Site isolation issue in the WebExtension...
Keywords:
Status: NEW
Alias: CVE-2026-74960
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: 2026-08-18 12:53 UTC by OSIDB Bzimport
Modified: 2026-08-18 19:25 UTC (History)
5 users (show)

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

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-08-18 12:53:58 UTC 
Site isolation issue in the WebExtensions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.
Note You need to log in before you can comment on or make changes to this bug.