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CVE-2026-4371

HIGH(7.4)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Risk Signal Score19/100 — NIEDRIG
  • CVSS 7.4 — Hoch

EPSS-Score

0%

Exploit-Wahrscheinlichkeit (30 Tage)

CVSS Score

7.4

Technische Schwere

Beschreibung

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.

Referenzen