CVE-2026-89058
Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config
CVSS Score
7.4
EPSS Score
0.3%
EPSS Percentile
17th
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.
| CWE | CWE-346 |
| Vendor | red hat |
| Published | Sep 18, 2026 |
| Last Updated | Oct 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Red Hat /
0 < 6.2.19.Final 7.0.0.Alpha1 < 7.0.5.Final
Red Hat / Red Hat build of Quarkus 3.27.6.redhat
All versions affected Red Hat / Red Hat build of Quarkus 3.33.4.redhat
All versions affected Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3
All versions affected Red Hat / Red Hat build of Apicurio Registry 3
All versions affected Red Hat / Red Hat build of Debezium 3
All versions affected Red Hat / Red Hat Build of Keycloak
All versions affected Red Hat / Red Hat Build of Keycloak
All versions affected Red Hat / Red Hat Certificate System 10
All versions affected Red Hat / Red Hat Certificate System 11
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Fuse 7
All versions affected Red Hat / Red Hat Fuse 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 8
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat Satellite 6
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:83082 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:83520 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:85234 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:92408 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-89058 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2519775 github.com: https://github.com/resteasy/resteasy/commit/efeb2b7 github.com: https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3
Credits
Red Hat would like to thank Yu Bao (PayPal Cyber Security Team) for reporting this issue.