{"id":"CVE-2026-89058","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89058","summary":"A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins (\"*\"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together…","details":"A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins (\"*\"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.","published":"2026-09-18T08:17:01.653","modified":"2026-09-18T08:17:01.653","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-89058"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2519775"},{"type":"WEB","url":"https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-18T08:17:01.653"}}