thunderbird: Out of bounds read in IMAP parsing

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: 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...

thunderbird: Out of bounds read in IMAP parsing

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: 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...

CVE-2026-4371

The Mozilla Thunderbird email client is vulnerable to an out-of-bounds read in the IMAP parsing component. A malicious mail server can send malformed strings with negative lengths, triggering the parser to read memory outside the buffer. If a mail server or connection is compromised, an attacker ...