vulnerability
MFSA2026-24 Thunderbird: Security Vulnerabilities fixed in Thunderbird 140.9 (CVE-2026-4696)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 10 | (AV:N/AC:L/Au:N/C:C/I:C/A:C) | Mar 24, 2026 | Mar 27, 2026 | Mar 27, 2026 |
Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
Mar 24, 2026
Added
Mar 27, 2026
Modified
Mar 27, 2026
Description
Use-after-free in the Layout: Text and Fonts component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
Solution
mozilla-thunderbird-upgrade-140_9
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