CVE-2011-4603: Pidgin

Medium severity, CVSS 5.0. EPSS: 3.6% chance of exploitation in the next 30 days.

The silc_channel_message function in ops.c in the SILC protocol plugin in libpurple in Pidgin before 2.10.1 does not perform the expected UTF-8 validation on message data, which allows remote attackers to cause a denial of service (application crash) via a crafted message, a different vulnerability than CVE-2011-3594.

Affected products

• Pidgin Pidgin: up to and including 2.10.0; version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; version 2.1.1 only; …

Published 2011-12-17. Last modified 2026-06-16.