{"id":"CVE-2026-28149","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-28149","summary":"Unauthenticated PHP Object Injection in Headless Single Sign On <= 1.6 versions.","details":"Unauthenticated PHP Object Injection in Headless Single Sign On <= 1.6 versions.","published":"2026-08-13T14:16:58.070","modified":"2026-08-14T19:09:20.713","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://patchstack.com/database/wordpress/plugin/headless-single-sign-on/vulnerability/wordpress-headless-single-sign-on-plugin-1-6-php-object-injection-vulnerability?_s_id=cve"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T19:09:20.713"}}