{"action":"Upgrade simplesamlphp/simplesamlphp to 2.4.7 or later.","affected":[{"fixed":"2.5.2","introduced":"2.5.0"},{"fixed":"2.4.7","introduced":"0"}],"component":"simplesamlphp/simplesamlphp","cve_ids":["CVE-2026-49284"],"ecosystem":"Packagist","epss":0.00222,"exploited":false,"fixed_versions":["2.5.2","2.4.7"],"ghsa_id":"GHSA-q8r6-xj3f-wrrm","id":"tcs_01M5KF746VHWDF14BGZ2G7XGB4","modified_at":"2026-09-10T03:50:52.943966319Z","published_at":"2026-07-02T20:47:21Z","references":["https://osv.dev/vulnerability/GHSA-q8r6-xj3f-wrrm","https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-q8r6-xj3f-wrrm","https://github.com/simplesamlphp/simplesamlphp"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"GHSA-q8r6-xj3f-wrrm","url":"https://osv.dev/vulnerability/GHSA-q8r6-xj3f-wrrm"}],"summary":"SimpleSAMLphp SP accepts a response from an unexpected IdP when unsigned `Response/InResponseTo` is combined with a signed assertion lacking `SubjectConfirmationData/InResponseTo`"}