| Package | Affected versions | Patched versions |
|---|---|---|
| thunderbird | < 140.9.0< 149.0 | 140.9.0149.0 |
A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.
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