Bug 2517850 (CVE-2026-74986) - CVE-2026-74986 firefox: thunderbird: Site isolation issue in the CSS Parsing and Computation component
Summary: CVE-2026-74986 firefox: thunderbird: Site isolation issue in the CSS Parsing ...
Keywords:
Status: NEW
Alias: CVE-2026-74986
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-18 12:55 UTC by OSIDB Bzimport
Modified: 2026-08-20 23:02 UTC (History)
5 users (show)

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

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-08-18 12:55:13 UTC 
Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.
Note You need to log in before you can comment on or make changes to this bug.