Origin Validation Error Affecting org.jboss.resteasy:resteasy-core-spi package, versions [,6.2.19.Final)[7.0.0.Alpha1,7.0.5.Final)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGJBOSSRESTEASY-19964052
- published20 Sept 2026
- disclosed18 Sept 2026
- creditUnknown
Introduced: 18 Sep 2026
NewCVE-2026-89058 (opens in a new tab)How to fix?
Upgrade org.jboss.resteasy:resteasy-core-spi to version 6.2.19.Final, 7.0.5.Final or higher.
Overview
org.jboss.resteasy:resteasy-core-spi is a JBoss.org project aimed at providing productivity frameworks for developing client and server RESTful applications and services in Java.
Affected versions of this package are vulnerable to Origin Validation Error via the response and preflight handling in org.jboss.resteasy.plugins.interceptors.CorsFilter. An attacker can read authenticated cross-origin responses by sending requests from a malicious origin when allowedOrigins contains "*" and the filter reflects that concrete Origin back with Access-Control-Allow-Credentials: true. The vulnerable code accepts any origin under the wildcard configuration and emits Access-Control-Allow-Origin for the request origin rather than a literal wildcard, while also allowing credentials. In a browser, that lets an attacker-controlled site use the victim’s session to fetch and exfiltrate per-user data exposed by REST endpoints.