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CVE-2026-5734
Published: Apr 7, 2026
Modified: May 26, 2026
PUBLISHED
Description
Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
| Vendor | Product | Versions |
|---|---|---|
Mozilla | Firefox | unaffected 140.9.1 - <= 140.*unaffected 149.0.2 - <= * |
Mozilla | Thunderbird | unaffected 140.9.1 - <= 140.*unaffected 149.0.2 - <= * |
References
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