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.
SeverityHigh
CVSS7.4
Exploit probability—
Product
Red Hat Resteasy
PublishedSep 18, 2026
First seenSep 18, 2026
Weakness typeCWE-346CWE-346
How to fix
Update
- Red Hat RESTEasy6.2.19.Final, 7.0.5.Final or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat RESTEasy | v < 6.2.19.Final, 7.0.0.Alpha1 ≤ v < 7.0.5.Final | 6.2.19.Final, 7.0.5.Final |
| quarkus 3.27 | No range specified | — |
| quarkus 3.33 | No range specified | — |
| Red Hat Red Hat Enterprise Linux 10 | No range specified | — |
| enterprise_linux 9 | No range specified | — |
| Red Hat Red Hat build of Apache Camel 4 for Quarkus 3 | No range specified | — |
| Red Hat Red Hat build of Apicurio Registry 3 | No range specified | — |
| Red Hat Red Hat build of Debezium 3 | No range specified | — |
| Red Hat Red Hat Build of Keycloak | No range specified | — |
| Red Hat Red Hat Certificate System 10 | No range specified | — |
| Red Hat Red Hat Certificate System 11 | No range specified | — |
| Red Hat Red Hat Fuse 7 | No range specified | — |
| Red Hat Red Hat JBoss Enterprise Application Platform 7 | No range specified | — |
| Red Hat Red Hat JBoss Enterprise Application Platform 8 | No range specified | — |
| Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack | No range specified | — |
| Red Hat Red Hat Single Sign-On 7 | No range specified | — |
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