critical
CVE-2026-4711
firefox: thunderbird: Use-after-free in the Widget: Cocoa component
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by AlmaLinux (high), Amazon (high), Oracle (high), Rocky Linux (high), Red Hat (medium), Ubuntu (medium).
Description
Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| alma 8 | firefox, thunderbird | 140.9.0-1.el8_10.alma.1 |
| alma 9 | firefox, firefox-x11, thunderbird | 140.9.0-1.el9_7.alma.1 |
| amazon linux 2 | thunderbird | 140.9.0-1.amzn2.0.2 |
| amazon linux 2023 | firefox, firefox-debuginfo, firefox-debugsource | 140.9.0-1.amzn2023.0.2 |
| chainguard | firefox, firefox-esr | 149.0-r0 and 1 more |
| Oracle Linux 7 | firefox | 140.9.0-1.0.1.el7_9 |
| Oracle Linux 8 | firefox, thunderbird | 140.9.0-1.0.1.el8_10 |
| Oracle Linux 9 | firefox, firefox-x11, thunderbird | 140.9.0-1.0.1.el9_7 |
| rapidfort alpine 3.20 | thunderbird | 144.0-r0 |
| rapidfort alpine 3.21 | thunderbird | 144.0-r0 |
| rapidfort alpine 3.22 | thunderbird | 144.0-r0 |
| rapidfort alpine 3.23 | thunderbird | 144.0-r0 |
Show all 45 entries from 25 sources
| Source | Package | Fixed in |
|---|---|---|
| alma 8 | firefox | 140.9.0-1.el8_10.alma.1 |
| alma 8 | thunderbird | 140.9.0-1.el8_10.alma.1 |
| alma 9 | firefox | 140.9.0-1.el9_7.alma.1 |
| alma 9 | firefox-x11 | 140.9.0-1.el9_7.alma.1 |
| alma 9 | thunderbird | 140.9.0-1.el9_7.alma.1 |
| amazon linux 2 | thunderbird | 140.9.0-1.amzn2.0.2 |
| amazon linux 2023 | firefox | 140.9.0-1.amzn2023.0.2 |
| amazon linux 2023 | firefox-debuginfo | 140.9.0-1.amzn2023.0.2 |
| amazon linux 2023 | firefox-debugsource | 140.9.0-1.amzn2023.0.2 |
| chainguard | firefox | 149.0-r0 |
| chainguard | firefox-esr | 140.9.0-r0 |
| Oracle Linux 7 | firefox | 140.9.0-1.0.1.el7_9 |
| Oracle Linux 8 | firefox | 140.9.0-1.0.1.el8_10 |
| Oracle Linux 8 | thunderbird | 140.9.0-1.0.1.el8_10 |
| Oracle Linux 9 | firefox | 140.9.0-1.0.1.el9_7 |
| Oracle Linux 9 | firefox-x11 | 140.9.0-1.0.1.el9_7 |
| Oracle Linux 9 | thunderbird | 140.9.0-1.0.1.el9_7 |
| rapidfort alpine 3.20 | thunderbird | 144.0-r0 |
| rapidfort alpine 3.21 | thunderbird | 144.0-r0 |
| rapidfort alpine 3.22 | thunderbird | 144.0-r0 |
| rapidfort alpine 3.23 | thunderbird | 144.0-r0 |
| rapidfort amazon linux 2023 | firefox | 140.9.0-1.amzn2023.0.2 |
| rapidfort fedora 43 | firefox | 149.0.2-1.fc43 |
| rapidfort fedora 43 | firefox-langpacks | 149.0.2-1.fc43 |
| rapidfort fedora 43 | thunderbird | 145.0-1.fc43 |
| rapidfort fedora 43 | thunderbird-librnp-rnp | 145.0-1.fc43 |
| rapidfort Oracle Linux 10 | firefox | 0:140.9.0-1.0.1.el10_1 |
| rapidfort Oracle Linux 10 | thunderbird | 0:140.9.0-1.0.1.el10_1 |
| rapidfort Oracle Linux 9 | firefox | 0:140.9.0-1.0.1.el9_7 |
| rapidfort Oracle Linux 9 | firefox-x11 | 0:140.9.0-1.0.1.el9_7 |
| rapidfort Oracle Linux 9 | thunderbird | 0:140.9.0-1.0.1.el9_7 |
| rapidfort ubuntu 20.04 | thunderbird | no fix listed |
| rapidfort ubuntu 22.04 | thunderbird | no fix listed |
| rapidfort ubuntu 24.04 | thunderbird | no fix listed |
| Red Hat | firefox | no fix listed |
| Red Hat | thunderbird | no fix listed |
| rocky 10 | firefox | 140.9.0-1.el10_1 |
| rocky 10 | thunderbird | 140.9.0-1.el10_1 |
| rocky 8 | firefox | 140.9.0-1.el8_10 |
| rocky 8 | thunderbird | 140.9.0-1.el8_10 |
| rocky 9 | firefox | 140.9.0-1.el9_7 |
| rocky 9 | firefox-x11 | 140.9.0-1.el9_7 |
| rocky 9 | thunderbird | 140.9.0-1.el9_7 |
| ubuntu 22.04 | thunderbird | no fix listed |
| wolfi | firefox | 149.0-r0 |
References
- https://access.redhat.com/errata/RHSA-2026:6188
- https://access.redhat.com/security/cve/CVE-2026-4711
- https://bugzilla.mozilla.org/show_bug.cgi?id=2017002
- https://bugzilla.redhat.com/2450710
- https://bugzilla.redhat.com/2450711
- https://bugzilla.redhat.com/2450712
- https://bugzilla.redhat.com/2450713
- https://bugzilla.redhat.com/2450714
All 136 references
- https://bugzilla.redhat.com/2450715
- https://bugzilla.redhat.com/2450718
- https://bugzilla.redhat.com/2450719
- https://bugzilla.redhat.com/2450720
- https://bugzilla.redhat.com/2450721
- https://bugzilla.redhat.com/2450722
- https://bugzilla.redhat.com/2450723
- https://bugzilla.redhat.com/2450724
- https://bugzilla.redhat.com/2450725
- https://bugzilla.redhat.com/2450726
- https://bugzilla.redhat.com/2450727
- https://bugzilla.redhat.com/2450728
- https://bugzilla.redhat.com/2450729
- https://bugzilla.redhat.com/2450730
- https://bugzilla.redhat.com/2450732
- https://bugzilla.redhat.com/2450733
- https://bugzilla.redhat.com/2450734
- https://bugzilla.redhat.com/2450735
- https://bugzilla.redhat.com/2450738
- https://bugzilla.redhat.com/2450739
- https://bugzilla.redhat.com/2450740
- https://bugzilla.redhat.com/2450741
- https://bugzilla.redhat.com/2450742
- https://bugzilla.redhat.com/2450744
- https://bugzilla.redhat.com/2450746
- https://bugzilla.redhat.com/2450747
- https://bugzilla.redhat.com/2450748
- https://bugzilla.redhat.com/2450751
- https://bugzilla.redhat.com/2450752
- https://bugzilla.redhat.com/2450755
- https://bugzilla.redhat.com/2450756
- https://bugzilla.redhat.com/2450757
- https://bugzilla.redhat.com/2451001
- https://bugzilla.redhat.com/2451006
- https://bugzilla.redhat.com/show_bug.cgi?id=2450710
- https://bugzilla.redhat.com/show_bug.cgi?id=2450711
- https://bugzilla.redhat.com/show_bug.cgi?id=2450712
- https://bugzilla.redhat.com/show_bug.cgi?id=2450713
- https://bugzilla.redhat.com/show_bug.cgi?id=2450714
- https://bugzilla.redhat.com/show_bug.cgi?id=2450715
- https://bugzilla.redhat.com/show_bug.cgi?id=2450718
- https://bugzilla.redhat.com/show_bug.cgi?id=2450719
- https://bugzilla.redhat.com/show_bug.cgi?id=2450720
- https://bugzilla.redhat.com/show_bug.cgi?id=2450721
- https://bugzilla.redhat.com/show_bug.cgi?id=2450722
- https://bugzilla.redhat.com/show_bug.cgi?id=2450723
- https://bugzilla.redhat.com/show_bug.cgi?id=2450724
- https://bugzilla.redhat.com/show_bug.cgi?id=2450725
- https://bugzilla.redhat.com/show_bug.cgi?id=2450726
- https://bugzilla.redhat.com/show_bug.cgi?id=2450727
- https://bugzilla.redhat.com/show_bug.cgi?id=2450728
- https://bugzilla.redhat.com/show_bug.cgi?id=2450729
- https://bugzilla.redhat.com/show_bug.cgi?id=2450730
- https://bugzilla.redhat.com/show_bug.cgi?id=2450732
- https://bugzilla.redhat.com/show_bug.cgi?id=2450733
- https://bugzilla.redhat.com/show_bug.cgi?id=2450734
- https://bugzilla.redhat.com/show_bug.cgi?id=2450735
- https://bugzilla.redhat.com/show_bug.cgi?id=2450738
- https://bugzilla.redhat.com/show_bug.cgi?id=2450739
- https://bugzilla.redhat.com/show_bug.cgi?id=2450740
- https://bugzilla.redhat.com/show_bug.cgi?id=2450741
- https://bugzilla.redhat.com/show_bug.cgi?id=2450742
- https://bugzilla.redhat.com/show_bug.cgi?id=2450744
- https://bugzilla.redhat.com/show_bug.cgi?id=2450746
- https://bugzilla.redhat.com/show_bug.cgi?id=2450747
- https://bugzilla.redhat.com/show_bug.cgi?id=2450748
- https://bugzilla.redhat.com/show_bug.cgi?id=2450751
- https://bugzilla.redhat.com/show_bug.cgi?id=2450752
- https://bugzilla.redhat.com/show_bug.cgi?id=2450755
- https://bugzilla.redhat.com/show_bug.cgi?id=2450756
- https://bugzilla.redhat.com/show_bug.cgi?id=2450757
- https://bugzilla.redhat.com/show_bug.cgi?id=2451001
- https://bugzilla.redhat.com/show_bug.cgi?id=2451006
- https://creativecommons.org/licenses/by/4.0/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-3889
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4371
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4684
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4685
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4686
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4687
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4688
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4689
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4690
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4691
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4692
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4693
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4694
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4695
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4696
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4697
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4698
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4699
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4700
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4701
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4702
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4704
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4705
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4706
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4707
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4708
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4709
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4710
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4711
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4712
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4713
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4714
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4715
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4716
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4717
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4718
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4719
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4720
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4721
- https://errata.almalinux.org/9/ALSA-2026-6188.html
- https://errata.rockylinux.org/RLSA-2026:6188
- https://linux.oracle.com/cve/CVE-2026-4711.html
- https://linux.oracle.com/errata/ELSA-2026-8427.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-4711
- https://www.cve.org/CVERecord?id=CVE-2026-4711
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-20/#CVE-2026-4711
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-22/#CVE-2026-4711
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-24/#CVE-2026-4711
- https://www.mozilla.org/security/advisories/mfsa2026-20/
- https://www.mozilla.org/security/advisories/mfsa2026-22/
- https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4711
- https://www.mozilla.org/security/advisories/mfsa2026-23/
- https://www.mozilla.org/security/advisories/mfsa2026-24/
- https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4711