Bug 2503454 (CVE-2026-16377) - CVE-2026-16377 firefox: thunderbird: Mitigation bypass in the PDF Viewer component
Summary: CVE-2026-16377 firefox: thunderbird: Mitigation bypass in the PDF Viewer comp...
Keywords:
Status: NEW
Alias: CVE-2026-16377
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: 2026-07-21 13:02 UTC by OSIDB Bzimport
Modified: 2026-08-12 12:59 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-2026:47101 0 None None None 2026-07-28 16:10:16 UTC
Red Hat Product Errata RHSA-2026:47104 0 None None None 2026-07-29 01:39:33 UTC
Red Hat Product Errata RHSA-2026:47105 0 None None None 2026-07-28 21:14:32 UTC
Red Hat Product Errata RHSA-2026:49621 0 None None None 2026-08-03 10:23:36 UTC
Red Hat Product Errata RHSA-2026:49921 0 None None None 2026-08-04 08:59:26 UTC
Red Hat Product Errata RHSA-2026:49922 0 None None None 2026-08-04 08:44:05 UTC
Red Hat Product Errata RHSA-2026:53444 0 None None None 2026-08-11 13:44:38 UTC
Red Hat Product Errata RHSA-2026:53445 0 None None None 2026-08-11 13:03:53 UTC
Red Hat Product Errata RHSA-2026:53446 0 None None None 2026-08-11 13:45:14 UTC
Red Hat Product Errata RHSA-2026:53453 0 None None None 2026-08-11 14:21:47 UTC
Red Hat Product Errata RHSA-2026:53454 0 None None None 2026-08-11 14:22:33 UTC
Red Hat Product Errata RHSA-2026:53455 0 None None None 2026-08-11 13:58:35 UTC
Red Hat Product Errata RHSA-2026:53475 0 None None None 2026-08-11 14:30:10 UTC
Red Hat Product Errata RHSA-2026:54180 0 None None None 2026-08-12 06:59:30 UTC
Red Hat Product Errata RHSA-2026:54181 0 None None None 2026-08-12 07:14:15 UTC
Red Hat Product Errata RHSA-2026:54182 0 None None None 2026-08-12 07:15:04 UTC
Red Hat Product Errata RHSA-2026:54185 0 None None None 2026-08-12 07:04:56 UTC
Red Hat Product Errata RHSA-2026:54248 0 None None None 2026-08-12 10:18:28 UTC
Red Hat Product Errata RHSA-2026:54249 0 None None None 2026-08-12 09:57:53 UTC
Red Hat Product Errata RHSA-2026:54259 0 None None None 2026-08-12 09:45:13 UTC
Red Hat Product Errata RHSA-2026:54339 0 None None None 2026-08-12 12:59:45 UTC

Description OSIDB Bzimport 2026-07-21 13:02:56 UTC 
Mitigation bypass in the PDF Viewer component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.
Comment 1 errata-xmlrpc 2026-07-28 16:10:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:47101 https://access.redhat.com/errata/RHSA-2026:47101
Comment 2 errata-xmlrpc 2026-07-28 21:14:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:47105 https://access.redhat.com/errata/RHSA-2026:47105
Comment 3 errata-xmlrpc 2026-07-29 01:39:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:47104 https://access.redhat.com/errata/RHSA-2026:47104
Comment 4 errata-xmlrpc 2026-08-03 10:23:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:49621 https://access.redhat.com/errata/RHSA-2026:49621
Comment 5 errata-xmlrpc 2026-08-04 08:44:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:49922 https://access.redhat.com/errata/RHSA-2026:49922
Comment 6 errata-xmlrpc 2026-08-04 08:59:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:49921 https://access.redhat.com/errata/RHSA-2026:49921
Comment 7 errata-xmlrpc 2026-08-11 13:03:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:53445 https://access.redhat.com/errata/RHSA-2026:53445
Comment 8 errata-xmlrpc 2026-08-11 13:44:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:53444 https://access.redhat.com/errata/RHSA-2026:53444
Comment 9 errata-xmlrpc 2026-08-11 13:45:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:53446 https://access.redhat.com/errata/RHSA-2026:53446
Comment 10 errata-xmlrpc 2026-08-11 13:58:34 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-2026:53455 https://access.redhat.com/errata/RHSA-2026:53455
Comment 11 errata-xmlrpc 2026-08-11 14:21:46 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-2026:53453 https://access.redhat.com/errata/RHSA-2026:53453
Comment 12 errata-xmlrpc 2026-08-11 14:22:32 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-2026:53454 https://access.redhat.com/errata/RHSA-2026:53454
Comment 13 errata-xmlrpc 2026-08-11 14:30:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:53475 https://access.redhat.com/errata/RHSA-2026:53475
Comment 14 errata-xmlrpc 2026-08-12 06:59:28 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-2026:54180 https://access.redhat.com/errata/RHSA-2026:54180
Comment 15 errata-xmlrpc 2026-08-12 07:04:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:54185 https://access.redhat.com/errata/RHSA-2026:54185
Comment 16 errata-xmlrpc 2026-08-12 07:14:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:54181 https://access.redhat.com/errata/RHSA-2026:54181
Comment 17 errata-xmlrpc 2026-08-12 07:15:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:54182 https://access.redhat.com/errata/RHSA-2026:54182
Comment 18 errata-xmlrpc 2026-08-12 09:45:11 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-2026:54259 https://access.redhat.com/errata/RHSA-2026:54259
Comment 19 errata-xmlrpc 2026-08-12 09:57:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:54249 https://access.redhat.com/errata/RHSA-2026:54249
Comment 20 errata-xmlrpc 2026-08-12 10:18:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:54248 https://access.redhat.com/errata/RHSA-2026:54248
Comment 21 errata-xmlrpc 2026-08-12 12:59:43 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-2026:54339 https://access.redhat.com/errata/RHSA-2026:54339
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