CVE-2023-30575: Apache Guacamole

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

Apache Guacamole 1.5.1 and older may incorrectly calculate the lengths of instruction elements sent during the Guacamole protocol handshake, potentially allowing an attacker to inject Guacamole instructions during the handshake through specially-crafted data.

Affected products

• Apache Guacamole: before 1.5.2 (fixed in 1.5.2)

Published 2023-06-07. Last modified 2026-06-17.