CVE-2022-41318: Squid-Cache Squid

High severity, CVSS 8.6. EPSS: 3% chance of exploitation in the next 30 days.

A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6. Due to incorrect integer-overflow protection, the SSPI and SMB authentication helpers are vulnerable to reading unintended memory locations. In some configurations, cleartext credentials from these locations are sent to a client. This is fixed in 5.7.

Affected products

• Squid-Cache Squid: from 2.5, before 5.7 (fixed in 5.7)

Published 2022-12-25. Last modified 2026-06-17.