Mozilla Thunderbird Update Fixes Security Flaw

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7.5

Mozilla Thunderbird Update Fixes Security Flaw

RHSA-2026:3979

Summary

Mozilla Thunderbird, a popular email client, has been updated to address a security issue that could allow an attacker to execute malicious code on a user's system. This update is recommended to ensure the security and integrity of your email communications. Update to the latest version of Thunderbird to resolve this issue.

What to do

Update redhat thunderbird to version 0:140.8.0-1.el8_6.
Update redhat thunderbird-debuginfo to version 0:140.8.0-1.el8_6.
Update redhat thunderbird-debugsource to version 0:140.8.0-1.el8_6.

Affected software

Vendor	Product	Affected versions	Fix available
redhat	thunderbird	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird-debuginfo	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird-debugsource	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird-debuginfo	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird-debugsource	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird-debuginfo	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6
redhat	thunderbird-debugsource	<= 0:140.8.0-1.el8_6	0:140.8.0-1.el8_6

Original title

Red Hat Security Advisory: thunderbird security update

osv CVSS3.1 7.5

https://access.redhat.com/errata/RHSA-2026:3979 Vendor Advisory
https://access.redhat.com/security/updates/classification/#important Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2440219 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442284 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442287 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442288 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442290 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442291 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442292 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442294 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442295 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442297 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442298 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442300 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442302 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442304 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442307 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442308 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442309 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442312 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442313 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442314 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442316 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442318 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442319 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442320 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442322 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442324 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442325 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442326 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442327 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442328 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442329 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442331 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442333 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442334 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442335 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442337 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442342 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2442343 Third Party Advisory
https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_3979.j... Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-2447 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2447 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2447 Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-10/ Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2757 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2757 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2757 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2757 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2757 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2758 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2758 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2758 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2758 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2758 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2759 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2759 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2759 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2759 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2759 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2760 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2760 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2760 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2760 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2760 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2761 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2761 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2761 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2761 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2761 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2762 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2762 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2762 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2762 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2762 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2763 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2763 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2763 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2763 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2763 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2764 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2764 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2764 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2764 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2764 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2765 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2765 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2765 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2765 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2765 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2766 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2766 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2766 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2766 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2766 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2767 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2767 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2767 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2767 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2767 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2768 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2768 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2768 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2768 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2768 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2769 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2769 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2769 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2769 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2769 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2770 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2770 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2770 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2770 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2770 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2771 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2771 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2771 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2771 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2771 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2772 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2772 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2772 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2772 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2772 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2773 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2773 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2773 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2773 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2773 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2774 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2774 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2774 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2774 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2774 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2775 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2775 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2775 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2775 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2775 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2776 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2776 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2776 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2776 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2776 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2777 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2777 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2777 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2777 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2777 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2778 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2778 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2778 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2778 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2778 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2779 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2779 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2779 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2779 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2779 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2780 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2780 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2780 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2780 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2780 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2781 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2781 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2781 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2781 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2781 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2782 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2782 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2782 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2782 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2782 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2783 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2783 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2783 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2783 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2783 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2784 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2784 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2784 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2784 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2784 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2785 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2785 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2785 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2785 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2785 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2786 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2786 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2786 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2786 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2786 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2787 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2787 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2787 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2787 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2787 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2788 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2788 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2788 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2788 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2788 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2789 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2789 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2789 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2789 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2789 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2790 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2790 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2790 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2790 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2790 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2791 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2791 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2791 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2791 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2791 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2792 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2792 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2792 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2792 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2792 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2793 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-2793 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-2793 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/#CVE-2026-2793 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/#CVE-2026-2793 Third Party Advisory

Published: 9 Mar 2026 · Updated: 13 Mar 2026 · First seen: 9 Mar 2026