{"action":"Upgrade simplesamlphp/saml2-legacy to 4.19.3 or later.","affected":[{"fixed":"4.20.2","introduced":"4.20.0"},{"fixed":"4.19.3","introduced":"0"}],"component":"simplesamlphp/saml2-legacy","cve_ids":["CVE-2026-49283"],"ecosystem":"Packagist","epss":0.00472,"exploited":false,"fixed_versions":["4.20.2","4.19.3"],"ghsa_id":"GHSA-6929-8p9f-26jx","id":"tcs_01M5KEWWWF5XQW40KF0DM9ZGF7","modified_at":"2026-08-04T21:30:19.900068063Z","published_at":"2026-07-02T20:25:56Z","references":["https://osv.dev/vulnerability/GHSA-6929-8p9f-26jx","https://github.com/simplesamlphp/saml2/security/advisories/GHSA-6929-8p9f-26jx","https://github.com/simplesamlphp/saml2"],"severity":{"label":"high","score":8.7},"sources":[{"source":"osv","source_id":"GHSA-6929-8p9f-26jx#Packagist/simplesamlphp/saml2-legacy","url":"https://osv.dev/vulnerability/GHSA-6929-8p9f-26jx"}],"summary":"SimpleSAMLphp HTTP-Artifact TLS validator confusion allows cross-IdP authentication bypass"}