CVE-2008-4070: Mozilla Seamonkey

High severity, CVSS 10.0. EPSS: 7.4% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Mozilla Thunderbird before 2.0.0.17 and SeaMonkey before 1.1.12 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long header in a news article, related to "canceling [a] newsgroup message" and "cancelled newsgroup messages."

Affected products

• Mozilla Seamonkey: up to and including 1.1.11; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …
• Mozilla Thunderbird: up to and including 2.0.0.16; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2008-09-27. Last modified 2026-06-16.