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CVE-2026-4371

Опубликовано: 24 мар. 2026
Источник: debian

Описание

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 affects Thunderbird < 149 and Thunderbird < 140.9.

Пакеты

ПакетСтатусВерсия исправленияРелизТип
thunderbirdfixed1:140.9.0esr-1package

Примечания

  • https://www.mozilla.org/en-US/security/advisories/mfsa2026-24/#CVE-2026-4371

Связанные уязвимости

CVSS3: 7.4
ubuntu
14 дней назад

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 affects Thunderbird < 149 and Thunderbird < 140.9.

CVSS3: 8.2
redhat
14 дней назад

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 affects Thunderbird < 149 and Thunderbird < 140.9.

CVSS3: 7.4
nvd
14 дней назад

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 affects Thunderbird < 149 and Thunderbird < 140.9.

CVSS3: 7.4
github
14 дней назад

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 affects Thunderbird < 149 and Thunderbird < 140.9.

oracle-oval
7 дней назад

ELSA-2026-6342: thunderbird security update (IMPORTANT)