Mozilla Thunderbird (rm) 139.0
Mozilla Thunderbird (rm) 139.0, released May 27, 2025, fixes 3 CVEs in Mozilla Thunderbird (rm). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird (rm) is 159.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Thunderbird (rm) is 159.0, which also fixes every CVE on this page. Install that instead.
Priority of the 3 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Thunderbird (rm) | 139.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2025-5268 | Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11 | 8.8 | 0.0051 | None reported |
| High | CVE-2025-5262 | Mozilla Thunderbird ESR and 2 others: Double Free | 7.5 | 0.0046 | None reported |
| High | CVE-2025-5272 | Memory safety bugs fixed in Firefox 139 and Thunderbird 139 | 7.3 | 0.0034 | None reported |
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