CVE-1999-1273: National Science Foundation Squid Web Proxy

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

Squid Internet Object Cache 1.1.20 allows users to bypass access control lists (ACLs) by encoding the URL with hexadecimal escape sequences.

Affected products

• National Science Foundation Squid Web Proxy: version 1.1.20 only

Published 1998-02-20. Last modified 2026-06-16.