{"id":"CVE-2021-41611","details":"An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2. When validating an origin server or peer certificate, Squid may incorrectly classify certain certificates as trusted. This problem allows a remote server to obtain security trust well improperly. This indication of trust may be passed along to clients, allowing access to unsafe or hijacked services.","modified":"2026-03-15T22:43:06.886968Z","published":"2021-10-18T09:15:08.823Z","related":["GHSA-47m4-g3mv-9q5r"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CWQ2WKDWTSO47S3F6XJJ6HGG2ULWEAE4/"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/12/23/2"},{"type":"ADVISORY","url":"http://www.squid-cache.org/Versions/v6/changesets/squid-6-43d6b5c81b88ec2256b430c69a872a1e4f324e4a.patch"},{"type":"FIX","url":"https://github.com/squid-cache/squid/security/advisories/GHSA-47m4-g3mv-9q5r"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/squid-cache/squid","events":[{"introduced":"1521895e24671463bf590cabcdbd2acf637ed2c1"},{"fixed":"74f073ecdc41e96dbf68e63550710fed7b8ad2d2"}],"database_specific":{"versions":[{"introduced":"5.0.6"},{"fixed":"5.2"}]}}],"versions":["SQUID_5_0_6","SQUID_5_0_7","SQUID_5_1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41611.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"35"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}