CVE-2011-3594: Pidgin Libpurple

Medium severity, CVSS 4.3. EPSS: 3.2% chance of exploitation in the next 30 days.

The g_markup_escape_text function in the SILC protocol plug-in in libpurple 2.10.0 and earlier, as used in Pidgin and possibly other products, allows remote attackers to cause a denial of service (crash) via invalid UTF-8 sequences that trigger use of invalid pointers and an out-of-bounds read, related to interactions with certain versions of glib2.

Affected products

• Pidgin Libpurple: up to and including 2.10.0; version 1.0 only; version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; …
• Pidgin Pidgin: any version

Published 2011-11-04. Last modified 2026-06-16.