Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config
Historical advisory recorded 4 Nov 2026 15:54:02 UTC. Read the latest advisory.
cve-program · CVE-2026-89058
PublishedA 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.
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cve-program · CVE-2026-89058
PublishedResteasy-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 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 published
- 18 Sep 2026 07:20:29 UTC
- Source modified
- 4 Nov 2026 14:46:27 UTC
- Saved here
- 4 Nov 2026 15:54:02 UTC
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CVSS 3.1 · 7.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N