CVE-2026-89058 Details
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Sep 18, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-942 | Permissive Cross-domain Policy with Untrusted Domains | CISA-ADP |
Affected Products
No affected product data is available for this CVE.
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 19, 2026 | CVE Modified | CISA-ADP |
| Sep 18, 2026 | CVE Modified | [email protected] |
| Sep 18, 2026 | CVE Modified | CISA-ADP |
| Sep 18, 2026 | CVE Modified | [email protected] |
| Sep 18, 2026 | New CVE Received | [email protected] |