Bug 2489244 (CVE-2026-12291) - CVE-2026-12291 firefox: thunderbird: Use-after-free in the Networking: HTTP component
Summary: CVE-2026-12291 firefox: thunderbird: Use-after-free in the Networking: HTTP c...
Keywords:
Status: NEW
Alias: CVE-2026-12291
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: 2026-06-16 14:03 UTC by OSIDB Bzimport
Modified: 2026-06-29 18:16 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-2026:27717 0 None None None 2026-06-22 03:03:49 UTC
Red Hat Product Errata RHSA-2026:27733 0 None None None 2026-06-22 03:50:35 UTC
Red Hat Product Errata RHSA-2026:27734 0 None None None 2026-06-22 04:18:33 UTC
Red Hat Product Errata RHSA-2026:29940 0 None None None 2026-06-25 15:59:12 UTC
Red Hat Product Errata RHSA-2026:30846 0 None None None 2026-06-29 18:16:59 UTC

Description OSIDB Bzimport 2026-06-16 14:03:15 UTC 
Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37.
Comment 1 errata-xmlrpc 2026-06-22 03:03:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:27717 https://access.redhat.com/errata/RHSA-2026:27717
Comment 2 errata-xmlrpc 2026-06-22 03:50:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:27733 https://access.redhat.com/errata/RHSA-2026:27733
Comment 3 errata-xmlrpc 2026-06-22 04:18:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:27734 https://access.redhat.com/errata/RHSA-2026:27734
Comment 4 errata-xmlrpc 2026-06-25 15:59:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:29940 https://access.redhat.com/errata/RHSA-2026:29940
Comment 5 errata-xmlrpc 2026-06-29 18:16:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:30846 https://access.redhat.com/errata/RHSA-2026:30846
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