Bug 2543121 (CVE-2026-100820) - CVE-2026-100820 firefox: thunderbird: Privilege escalation in the Address Bar component
Summary: CVE-2026-100820 firefox: thunderbird: Privilege escalation in the Address Bar...
Keywords:
Status: NEW
Alias: CVE-2026-100820
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: 2026-09-29 12:57 UTC by OSIDB Bzimport
Modified: 2026-10-29 18:26 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-2026:76761 0 None None None 2026-10-08 06:34:54 UTC
Red Hat Product Errata RHSA-2026:76764 0 None None None 2026-10-06 20:18:41 UTC
Red Hat Product Errata RHSA-2026:76850 0 None None None 2026-10-06 19:18:28 UTC
Red Hat Product Errata RHSA-2026:80674 0 None None None 2026-10-12 09:20:51 UTC
Red Hat Product Errata RHSA-2026:80694 0 None None None 2026-10-12 10:29:03 UTC
Red Hat Product Errata RHSA-2026:85240 0 None None None 2026-10-19 16:08:19 UTC
Red Hat Product Errata RHSA-2026:85241 0 None None None 2026-10-19 16:21:29 UTC
Red Hat Product Errata RHSA-2026:85242 0 None None None 2026-10-19 16:20:07 UTC
Red Hat Product Errata RHSA-2026:85243 0 None None None 2026-10-19 16:26:24 UTC
Red Hat Product Errata RHSA-2026:85244 0 None None None 2026-10-19 16:38:46 UTC
Red Hat Product Errata RHSA-2026:90913 0 None None None 2026-10-27 15:55:26 UTC
Red Hat Product Errata RHSA-2026:91633 0 None None None 2026-10-28 10:13:27 UTC
Red Hat Product Errata RHSA-2026:91634 0 None None None 2026-10-28 10:11:08 UTC
Red Hat Product Errata RHSA-2026:92011 0 None None None 2026-10-28 16:52:17 UTC
Red Hat Product Errata RHSA-2026:92012 0 None None None 2026-10-28 17:01:39 UTC
Red Hat Product Errata RHSA-2026:92226 0 None None None 2026-10-29 18:25:48 UTC
Red Hat Product Errata RHSA-2026:92227 0 None None None 2026-10-29 18:26:42 UTC
Red Hat Product Errata RHSA-2026:92228 0 None None None 2026-10-29 18:19:42 UTC
Red Hat Product Errata RHSA-2026:92327 0 None None None 2026-10-29 10:25:55 UTC
Red Hat Product Errata RHSA-2026:92335 0 None None None 2026-10-29 10:34:56 UTC
Red Hat Product Errata RHSA-2026:92363 0 None None None 2026-10-29 12:14:05 UTC

Description OSIDB Bzimport 2026-09-29 12:57:29 UTC 
Privilege escalation in the Address Bar component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
Comment 1 Jon Orris 2026-10-06 19:18:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:76850 https://access.redhat.com/errata/RHSA-2026:76850
Comment 2 Jon Orris 2026-10-06 20:18:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:76764 https://access.redhat.com/errata/RHSA-2026:76764
Comment 3 Jon Orris 2026-10-08 06:34:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:76761 https://access.redhat.com/errata/RHSA-2026:76761
Comment 4 Jon Orris 2026-10-12 09:20:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:80674 https://access.redhat.com/errata/RHSA-2026:80674
Comment 5 Jon Orris 2026-10-12 10:29:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:80694 https://access.redhat.com/errata/RHSA-2026:80694
Comment 6 Jon Orris 2026-10-19 16:08:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:85240 https://access.redhat.com/errata/RHSA-2026:85240
Comment 7 Jon Orris 2026-10-19 16:20:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:85242 https://access.redhat.com/errata/RHSA-2026:85242
Comment 8 Jon Orris 2026-10-19 16:21:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:85241 https://access.redhat.com/errata/RHSA-2026:85241
Comment 9 Jon Orris 2026-10-19 16:26:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:85243 https://access.redhat.com/errata/RHSA-2026:85243
Comment 10 Jon Orris 2026-10-19 16:38:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:85244 https://access.redhat.com/errata/RHSA-2026:85244
Comment 12 Jon Orris 2026-10-27 15:55:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:90913 https://access.redhat.com/errata/RHSA-2026:90913
Comment 13 Jon Orris 2026-10-28 10:11:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:91634 https://access.redhat.com/errata/RHSA-2026:91634
Comment 14 Jon Orris 2026-10-28 10:13:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:91633 https://access.redhat.com/errata/RHSA-2026:91633
Comment 15 Jon Orris 2026-10-28 16:52:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:92011 https://access.redhat.com/errata/RHSA-2026:92011
Comment 16 Jon Orris 2026-10-28 17:01:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:92012 https://access.redhat.com/errata/RHSA-2026:92012
Comment 17 Jon Orris 2026-10-29 10:25:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:92327 https://access.redhat.com/errata/RHSA-2026:92327
Comment 18 Jon Orris 2026-10-29 10:34:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:92335 https://access.redhat.com/errata/RHSA-2026:92335
Comment 19 Jon Orris 2026-10-29 12:14:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:92363 https://access.redhat.com/errata/RHSA-2026:92363
Comment 20 Jon Orris 2026-10-29 18:19:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:92228 https://access.redhat.com/errata/RHSA-2026:92228
Comment 21 Jon Orris 2026-10-29 18:25:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:92226 https://access.redhat.com/errata/RHSA-2026:92226
Comment 22 Jon Orris 2026-10-29 18:26:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:92227 https://access.redhat.com/errata/RHSA-2026:92227
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