CVE-2005-4591: Bogofilter Email Filter

High severity, CVSS 7.5. EPSS: 5.5% chance of exploitation in the next 30 days.

Heap-based buffer overflow in bogofilter 0.96.2, 0.95.2, 0.94.14, 0.94.12, and other versions from 0.93.5 to 0.96.2, when using Unicode databases, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via "invalid input sequences" that lead to heap corruption when bogofilter or bogolexer converts character sets.

Affected products

• Bogofilter Email Filter: version 0.93.5 only; version 0.94.12 only; version 0.94.14 only; version 0.95.2 only; version 0.96.2 only

Published 2005-12-31. Last modified 2026-06-16.