medium6.1
CVE-2026-103500
An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size.
Impact
An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Thunderbird | before 140.17.0 from 141.0 before 153.4.0 from 154.0 before 157.0 |