CVE-2026-89058highCWE-346CWE-942

CVE-2026-89058: high-severity vulnerability in Red Hat RESTEasy

Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.4epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Affected products
Red Hat · Red Hat build of Apache Camel 4 for Quarkus 3Red Hat · Red Hat build of Apicurio Registry 3Red Hat · Red Hat build of Debezium 3Red Hat · Red Hat Build of KeycloakRed Hat · Red Hat build of Quarkus 3.27.6.redhatRed Hat · Red Hat build of Quarkus 3.33.4.redhatRed Hat · Red Hat Certificate System 10Red Hat · Red Hat Certificate System 11Red Hat · Red Hat Enterprise Linux 10Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 9Red Hat · Red Hat Fuse 7Red Hat · Red Hat JBoss Enterprise Application Platform 7Red Hat · Red Hat JBoss Enterprise Application Platform 8Red Hat · Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat · Red Hat Satellite 6Red Hat · Red Hat Single Sign-On 7Red Hat · RESTEasy
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