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VULNERABILITIES

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 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3 CISA-ADP
https://access.redhat.com/errata/RHSA-2026:83082 [email protected]
https://access.redhat.com/errata/RHSA-2026:83520 [email protected]
https://access.redhat.com/errata/RHSA-2026:83670 [email protected]
https://access.redhat.com/errata/RHSA-2026:85234 [email protected]

see all 16 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-346Origin Validation Error[email protected]
CWE-942Permissive Cross-domain Policy with Untrusted DomainsCISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

17 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-89058
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Nov 9, 2026
Source:
[email protected]