CVE-2020-25097: An issue was discovered in Squid through 4.13 and 5.x through 5.0.4.

Security readout for executives and security teams

CVE-2020-25097 is a Squid proxy flaw where specific whitespace-handling settings can let a trusted client smuggle HTTP requests. The business risk is policy bypass: a client allowed to use the proxy may reach services that proxy controls were meant to block. Exposure is most likely where Squid is deployed as a forward or intermediary proxy, uses affected versions, and permits trusted clients. Debian, Fedora, Gentoo, and NetApp advisories indicate downstream package relevance, but the bundle does not enumerate every affected product build. Prioritize remediation for Squid proxies that enforce network access controls or broker access to internal services. Treat it as a meaningful control-bypass risk, especially in environments where trusted clients include broad user groups or less-managed systems. Mitigation focus: Upgrade Squid or downstream vendor packages beyond the affected versions.; Apply the referenced Squid SQUID-2020_11 patches if package upgrades are unavailable.; Review uri_whitespace settings against Squid vendor guidance..

Prepared

Jun 3, 2026, 03:04 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.