Bug 2442312 (CVE-2026-2777) - CVE-2026-2777 firefox: thunderbird: Privilege escalation in the Messaging System component
Summary: CVE-2026-2777 firefox: thunderbird: Privilege escalation in the Messaging Sys...
Keywords:
Status: NEW
Alias: CVE-2026-2777
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-24 14:04 UTC by OSIDB Bzimport
Modified: 2026-03-02 19:44 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-2026:3338 0 None None None 2026-02-25 11:32:28 UTC
Red Hat Product Errata RHSA-2026:3339 0 None None None 2026-02-25 11:43:18 UTC
Red Hat Product Errata RHSA-2026:3361 0 None None None 2026-02-25 15:21:19 UTC
Red Hat Product Errata RHSA-2026:3491 0 None None None 2026-03-02 05:42:20 UTC
Red Hat Product Errata RHSA-2026:3492 0 None None None 2026-03-02 05:43:21 UTC
Red Hat Product Errata RHSA-2026:3493 0 None None None 2026-03-02 05:49:04 UTC
Red Hat Product Errata RHSA-2026:3494 0 None None None 2026-03-02 05:54:11 UTC
Red Hat Product Errata RHSA-2026:3495 0 None None None 2026-03-02 05:53:11 UTC
Red Hat Product Errata RHSA-2026:3496 0 None None None 2026-03-02 06:02:08 UTC
Red Hat Product Errata RHSA-2026:3497 0 None None None 2026-03-02 06:09:45 UTC
Red Hat Product Errata RHSA-2026:3515 0 None None None 2026-03-02 11:33:11 UTC
Red Hat Product Errata RHSA-2026:3516 0 None None None 2026-03-02 11:38:19 UTC
Red Hat Product Errata RHSA-2026:3517 0 None None None 2026-03-02 11:36:45 UTC

Description OSIDB Bzimport 2026-02-24 14:04:12 UTC 
Privilege escalation in the Messaging System component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.
Comment 1 errata-xmlrpc 2026-02-25 11:32:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:3338 https://access.redhat.com/errata/RHSA-2026:3338
Comment 2 errata-xmlrpc 2026-02-25 11:43:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:3339 https://access.redhat.com/errata/RHSA-2026:3339
Comment 3 errata-xmlrpc 2026-02-25 15:21:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:3361 https://access.redhat.com/errata/RHSA-2026:3361
Comment 4 errata-xmlrpc 2026-03-02 05:42:18 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-2026:3491 https://access.redhat.com/errata/RHSA-2026:3491
Comment 5 errata-xmlrpc 2026-03-02 05:43:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:3492 https://access.redhat.com/errata/RHSA-2026:3492
Comment 6 errata-xmlrpc 2026-03-02 05:49:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:3493 https://access.redhat.com/errata/RHSA-2026:3493
Comment 7 errata-xmlrpc 2026-03-02 05:53:10 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:3495 https://access.redhat.com/errata/RHSA-2026:3495
Comment 8 errata-xmlrpc 2026-03-02 05:54:10 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-2026:3494 https://access.redhat.com/errata/RHSA-2026:3494
Comment 9 errata-xmlrpc 2026-03-02 06:02:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:3496 https://access.redhat.com/errata/RHSA-2026:3496
Comment 10 errata-xmlrpc 2026-03-02 06:09:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:3497 https://access.redhat.com/errata/RHSA-2026:3497
Comment 11 errata-xmlrpc 2026-03-02 11:33:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:3515 https://access.redhat.com/errata/RHSA-2026:3515
Comment 12 errata-xmlrpc 2026-03-02 11:36:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:3517 https://access.redhat.com/errata/RHSA-2026:3517
Comment 13 errata-xmlrpc 2026-03-02 11:38:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:3516 https://access.redhat.com/errata/RHSA-2026:3516
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