# CVE-2026-89058: Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config Status: published. Published: 2026-09-18. Updated: 2026-11-04. 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. ## Remediation No remediation reported in collected sources ## Affected products and versions - Red Hat / (RESTEasy): ≥ 0; < 6.2.19.Final (affected, maven); ≥ 7.0.0.Alpha1; < 7.0.5.Final (affected, maven). Source: CNA: redhat - Red Hat / Red Hat build of Quarkus 3.27.6.redhat (org.jboss.resteasy/resteasy-core): ≥ 6.2.19.Final-redhat-00003; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat build of Quarkus 3.33.4.redhat (org.jboss.resteasy/resteasy-core): ≥ 6.2.19.Final-redhat-00003; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 10 (dogtag-pki): ≥ 0:11.9.0-6.el10_2.1; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (resteasy): ≥ 0:3.0.26-20.el9_8.1; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 8.1 (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3 (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Apicurio Registry 3 (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Debezium 3 (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Build of Keycloak (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Build of Keycloak (rhbk/keycloak-rhel9-operator): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Certificate System 10 (redhat-pki:10/redhat-pki): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Certificate System 11 (redhat-pki): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 8 (pki-core:10.6/pki-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (jackson-jaxrs-providers): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (pki-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Fuse 7 (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Fuse 7 (resteasy-jaxrs): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 7 (jboss-eap-7/eap74-els-openjdk11-openshift-rhel8): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 7 (jboss-eap-7/eap74-els-openjdk17-openshift-rhel8): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 7 (jboss-eap-7/eap74-els-openjdk8-openshift-rhel8): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 7 (resteasy-jaxrs): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 8 (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack (resteasy-core): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Satellite 6 (candlepin): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Single Sign-On 7 (resteasy-jaxrs): Version range not reported. Source: CNA: redhat ## Severity and prioritization - CVSS 3.1: 7.4 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N; source: CNA: redhat - CISA KEV: No listing in collected sources - EPSS: 0.26% as of 2026-11-04; percentile 18.42% - SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP - Weaknesses: CWE-346, CWE-942 ## Exploit evidence - exploit: https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3 (ADP: CISA-ADP) ## References - https://access.redhat.com/errata/RHSA-2026:83082 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:83520 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:85234 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:92408 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:95221 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/security/cve/CVE-2026-89058 (CNA: redhat; vdb-entry, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2519775 (CNA: redhat; issue-tracking, x_refsource_REDHAT) - https://github.com/resteasy/resteasy/commit/efeb2b7 (CNA: redhat) - https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3 (CNA: redhat) - https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3 (ADP: CISA-ADP; exploit) ## Provenance - CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-89058; retrieved 2026-11-04; source updated 2026-11-04 - FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-89058; retrieved 2026-11-04; source updated Not reported Revision: 7fc6812b13cf6d3d1eb47e668f2d0577e1cfab4e0f32a5603d97119ce6ff72a5 Canonical: https://y2.dev/cve/CVE-2026-89058 ## Agent and API access Public CVE pages, Markdown, and JSON are free to read without an account or API key. - Public catalog: https://y2.dev/cve/index.json. 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