CVE-2026-89058 — Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config
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 respon…
Published: 2026-09-18 · CVSS: 7.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7