CVE-2009-3826: Squidguard

Medium severity, CVSS 5.0. EPSS: 3.8% chance of exploitation in the next 30 days.

Multiple buffer overflows in squidGuard 1.4 allow remote attackers to bypass intended URL blocking via a long URL, related to (1) the relationship between a certain buffer size in squidGuard and a certain buffer size in Squid and (2) a redirect URL that contains information about the originally requested URL.

Affected products

• Squidguard Squidguard: version 1.4 only

Published 2009-10-28. Last modified 2026-06-16.