Bug 2517866 (CVE-2026-74963) - CVE-2026-74963 firefox: thunderbird: Same-origin policy bypass in the Networking: Cookies component
Summary: CVE-2026-74963 firefox: thunderbird: Same-origin policy bypass in the Network...
Keywords:
Status: NEW
Alias: CVE-2026-74963
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 12:56 UTC by OSIDB Bzimport
Modified: 2026-08-24 10:05 UTC (History)
5 users (show)

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

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:58897 0 None None None 2026-08-24 10:05:45 UTC
Red Hat Product Errata RHSA-2026:58898 0 None None None 2026-08-24 09:36:36 UTC
Red Hat Product Errata RHSA-2026:58899 0 None None None 2026-08-24 09:35:09 UTC

Description OSIDB Bzimport 2026-08-18 12:56:38 UTC 
Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.
Comment 1 errata-xmlrpc 2026-08-24 09:35:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:58899 https://access.redhat.com/errata/RHSA-2026:58899
Comment 2 errata-xmlrpc 2026-08-24 09:36:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:58898 https://access.redhat.com/errata/RHSA-2026:58898
Comment 3 errata-xmlrpc 2026-08-24 10:05:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:58897 https://access.redhat.com/errata/RHSA-2026:58897
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