vulnerability
MFSA2025-32 Thunderbird: Security Vulnerabilities fixed in Thunderbird 128.10 (CVE-2025-4091)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:M/Au:N/C:C/I:C/A:C) | Apr 29, 2025 | Apr 30, 2025 | Dec 19, 2025 |
Severity
9
CVSS
(AV:N/AC:M/Au:N/C:C/I:C/A:C)
Published
Apr 29, 2025
Added
Apr 30, 2025
Modified
Dec 19, 2025
Description
Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird < 128.10.
Solution
mozilla-thunderbird-upgrade-128_10
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