CVE-2026-7323
High · 7.3CVSS
7.3
EPSS
0.5%
Published
Apr 28, 2026
CISA due date
—
The record
Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. 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 was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 16.0 | MozillaThunderbird | 0 | 140.12.0-bp160.1.1 |
| openSUSE:Tumbleweed | MozillaFirefox | 0 | 150.0.1-1.1 |
| openSUSE:Tumbleweed | MozillaThunderbird | 0 | 140.10.1-1.1 |
| openSUSE:Tumbleweed | firefox-esr | 0 | 140.10.1-1.1 |
Related vulnerabilities
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- CVE-2026-12327 Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and… Also affects MozillaThunderbird
- CVE-2026-12330 Incorrect boundary conditions in the Internationalization component. Also affects MozillaThunderbird
- CVE-2026-12329 Memory safety bug fixed in Thunderbird ESR 140.12. Also affects MozillaThunderbird
- CVE-2026-12328 Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR… Also affects MozillaThunderbird
- CVE-2026-12315 Mitigation bypass in the DOM: Security component. Also affects MozillaThunderbird
- CVE-2026-12314 Memory safety bug fixed in Thunderbird 152. Also affects MozillaThunderbird