An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.
www.squid-cache.org/Versions/v4/changesets/SQUID-2020_11.patch
www.squid-cache.org/Versions/v5/changesets/SQUID-2020_11.patch
github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DJMDRVV677AJL4BZAOLCT5LMFCGBZTC2/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FBXFWKIGXPERDVQXG556LLPUOCMQGERC/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3RYBDMJCPYGOSURWDR3WJTE474UFT77/
security.gentoo.org/glsa/202105-14
security.netapp.com/advisory/ntap-20210727-0010/
www.debian.org/security/2021/dsa-4873