Detections
Analytics
CVE-2026-89058
high
Description
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.
References
https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3
https://github.com/resteasy/resteasy/commit/efeb2b7