Bug 2517823 (CVE-2026-74987) - CVE-2026-74987 firefox: thunderbird: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154
Summary: CVE-2026-74987 firefox: thunderbird: Internally found bugs fixed in Firefox E...
Keywords:
Status: NEW
Alias: CVE-2026-74987
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-18 12:47 UTC by OSIDB Bzimport
Modified: 2026-09-09 10:31 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 10:05:53 UTC
Red Hat Product Errata RHSA-2026:58898 0 None None None 2026-08-24 09:36:09 UTC
Red Hat Product Errata RHSA-2026:58899 0 None None None 2026-08-24 09:34:58 UTC
Red Hat Product Errata RHSA-2026:64813 0 None None None 2026-09-08 04:05:34 UTC
Red Hat Product Errata RHSA-2026:64814 0 None None None 2026-09-08 03:26:59 UTC
Red Hat Product Errata RHSA-2026:65103 0 None None None 2026-09-08 08:14:18 UTC
Red Hat Product Errata RHSA-2026:65105 0 None None None 2026-09-08 08:04:31 UTC
Red Hat Product Errata RHSA-2026:65110 0 None None None 2026-09-08 07:36:39 UTC
Red Hat Product Errata RHSA-2026:65111 0 None None None 2026-09-08 07:25:53 UTC
Red Hat Product Errata RHSA-2026:65158 0 None None None 2026-09-08 11:48:02 UTC
Red Hat Product Errata RHSA-2026:65159 0 None None None 2026-09-08 09:45:56 UTC
Red Hat Product Errata RHSA-2026:65160 0 None None None 2026-09-08 09:53:54 UTC
Red Hat Product Errata RHSA-2026:65442 0 None None None 2026-09-08 13:30:32 UTC
Red Hat Product Errata RHSA-2026:65633 0 None None None 2026-09-08 19:13:41 UTC
Red Hat Product Errata RHSA-2026:65669 0 None None None 2026-09-08 20:59:07 UTC
Red Hat Product Errata RHSA-2026:65670 0 None None None 2026-09-08 21:03:13 UTC
Red Hat Product Errata RHSA-2026:65757 0 None None None 2026-09-09 02:13:23 UTC
Red Hat Product Errata RHSA-2026:65764 0 None None None 2026-09-09 02:30:32 UTC
Red Hat Product Errata RHSA-2026:65765 0 None None None 2026-09-09 02:41:49 UTC
Red Hat Product Errata RHSA-2026:65766 0 None None None 2026-09-09 03:04:38 UTC
Red Hat Product Errata RHSA-2026:65888 0 None None None 2026-09-09 10:31:30 UTC

Description OSIDB Bzimport 2026-08-18 12:47:14 UTC 
Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.
Comment 1 errata-xmlrpc 2026-08-24 09:34:57 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 09:36:08 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 10:05:52 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
Comment 4 errata-xmlrpc 2026-09-08 03:26:58 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-2026:64814 https://access.redhat.com/errata/RHSA-2026:64814
Comment 5 errata-xmlrpc 2026-09-08 04:05:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:64813 https://access.redhat.com/errata/RHSA-2026:64813
Comment 6 errata-xmlrpc 2026-09-08 07:25:52 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-2026:65111 https://access.redhat.com/errata/RHSA-2026:65111
Comment 7 errata-xmlrpc 2026-09-08 07:36:38 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-2026:65110 https://access.redhat.com/errata/RHSA-2026:65110
Comment 8 errata-xmlrpc 2026-09-08 08:04:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:65105 https://access.redhat.com/errata/RHSA-2026:65105
Comment 9 errata-xmlrpc 2026-09-08 08:14:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:65103 https://access.redhat.com/errata/RHSA-2026:65103
Comment 10 errata-xmlrpc 2026-09-08 09:45:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:65159 https://access.redhat.com/errata/RHSA-2026:65159
Comment 11 errata-xmlrpc 2026-09-08 09:53:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:65160 https://access.redhat.com/errata/RHSA-2026:65160
Comment 12 errata-xmlrpc 2026-09-08 11:48:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:65158 https://access.redhat.com/errata/RHSA-2026:65158
Comment 13 errata-xmlrpc 2026-09-08 13:30:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:65442 https://access.redhat.com/errata/RHSA-2026:65442
Comment 14 errata-xmlrpc 2026-09-08 19:13:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:65633 https://access.redhat.com/errata/RHSA-2026:65633
Comment 15 errata-xmlrpc 2026-09-08 20:59:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:65669 https://access.redhat.com/errata/RHSA-2026:65669
Comment 16 errata-xmlrpc 2026-09-08 21:03:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:65670 https://access.redhat.com/errata/RHSA-2026:65670
Comment 17 errata-xmlrpc 2026-09-09 02:13:22 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-2026:65757 https://access.redhat.com/errata/RHSA-2026:65757
Comment 18 errata-xmlrpc 2026-09-09 02:30:31 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-2026:65764 https://access.redhat.com/errata/RHSA-2026:65764
Comment 19 errata-xmlrpc 2026-09-09 02:41:48 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-2026:65765 https://access.redhat.com/errata/RHSA-2026:65765
Comment 20 errata-xmlrpc 2026-09-09 03:04:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:65766 https://access.redhat.com/errata/RHSA-2026:65766
Comment 21 errata-xmlrpc 2026-09-09 10:31:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:65888 https://access.redhat.com/errata/RHSA-2026:65888
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