Bug 2442320 (CVE-2026-2786) - CVE-2026-2786 firefox: thunderbird: Use-after-free in the JavaScript Engine component
Summary: CVE-2026-2786 firefox: thunderbird: Use-after-free in the JavaScript Engine c...
Keywords:
Status: NEW
Alias: CVE-2026-2786
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
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: 2026-04-07 09:03 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 11:32:36 UTC
Red Hat Product Errata RHSA-2026:3339 0 None None None 2026-02-25 11:42:30 UTC
Red Hat Product Errata RHSA-2026:3361 0 None None None 2026-02-25 15:20:34 UTC
Red Hat Product Errata RHSA-2026:3491 0 None None None 2026-03-02 05:42:12 UTC
Red Hat Product Errata RHSA-2026:3492 0 None None None 2026-03-02 05:43:31 UTC
Red Hat Product Errata RHSA-2026:3493 0 None None None 2026-03-02 05:49:12 UTC
Red Hat Product Errata RHSA-2026:3494 0 None None None 2026-03-02 05:54:19 UTC
Red Hat Product Errata RHSA-2026:3495 0 None None None 2026-03-02 05:53:03 UTC
Red Hat Product Errata RHSA-2026:3496 0 None None None 2026-03-02 06:02:00 UTC
Red Hat Product Errata RHSA-2026:3497 0 None None None 2026-03-02 06:09:37 UTC
Red Hat Product Errata RHSA-2026:3515 0 None None None 2026-03-02 11:33:37 UTC
Red Hat Product Errata RHSA-2026:3516 0 None None None 2026-03-02 11:38:42 UTC
Red Hat Product Errata RHSA-2026:3517 0 None None None 2026-03-02 11:37:08 UTC
Red Hat Product Errata RHSA-2026:3976 0 None None None 2026-03-09 01:57:22 UTC
Red Hat Product Errata RHSA-2026:3978 0 None None None 2026-03-09 01:49:25 UTC
Red Hat Product Errata RHSA-2026:3979 0 None None None 2026-03-09 01:51:27 UTC
Red Hat Product Errata RHSA-2026:3980 0 None None None 2026-03-09 01:56:10 UTC
Red Hat Product Errata RHSA-2026:3981 0 None None None 2026-03-09 01:55:24 UTC
Red Hat Product Errata RHSA-2026:3982 0 None None None 2026-03-09 02:00:17 UTC
Red Hat Product Errata RHSA-2026:3983 0 None None None 2026-03-09 01:47:18 UTC
Red Hat Product Errata RHSA-2026:3984 0 None None None 2026-03-09 01:54:27 UTC
Red Hat Product Errata RHSA-2026:4022 0 None None None 2026-03-09 11:20:48 UTC
Red Hat Product Errata RHSA-2026:4152 0 None None None 2026-03-10 06:08:27 UTC
Red Hat Product Errata RHSA-2026:4260 0 None None None 2026-03-11 05:52:31 UTC
Red Hat Product Errata RHSA-2026:4432 0 None None None 2026-03-12 08:17:46 UTC

Description OSIDB Bzimport 2026-02-24 14:04:48 UTC 
Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8.
Comment 1 errata-xmlrpc 2026-02-25 11:32:35 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 11:42:29 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 15:20:33 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 05:42:10 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 05:43:30 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 05:49:10 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 05:53:02 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 05:54:18 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 06:01:58 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 06:09:36 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 11:33:35 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 11:37:07 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 11:38:41 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
Comment 14 errata-xmlrpc 2026-03-09 01:47:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:3983 https://access.redhat.com/errata/RHSA-2026:3983
Comment 15 errata-xmlrpc 2026-03-09 01:49:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:3978 https://access.redhat.com/errata/RHSA-2026:3978
Comment 16 errata-xmlrpc 2026-03-09 01:51:26 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-2026:3979 https://access.redhat.com/errata/RHSA-2026:3979
Comment 17 errata-xmlrpc 2026-03-09 01:54:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:3984 https://access.redhat.com/errata/RHSA-2026:3984
Comment 18 errata-xmlrpc 2026-03-09 01:55:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:3981 https://access.redhat.com/errata/RHSA-2026:3981
Comment 19 errata-xmlrpc 2026-03-09 01:56:09 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-2026:3980 https://access.redhat.com/errata/RHSA-2026:3980
Comment 20 errata-xmlrpc 2026-03-09 01:57:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:3976 https://access.redhat.com/errata/RHSA-2026:3976
Comment 21 errata-xmlrpc 2026-03-09 02:00:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:3982 https://access.redhat.com/errata/RHSA-2026:3982
Comment 22 errata-xmlrpc 2026-03-09 11:20:47 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-2026:4022 https://access.redhat.com/errata/RHSA-2026:4022
Comment 23 errata-xmlrpc 2026-03-10 06:08:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:4152 https://access.redhat.com/errata/RHSA-2026:4152
Comment 24 errata-xmlrpc 2026-03-11 05:52:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:4260 https://access.redhat.com/errata/RHSA-2026:4260
Comment 25 errata-xmlrpc 2026-03-12 08:17:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:4432 https://access.redhat.com/errata/RHSA-2026:4432
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