CVE-2026-89058
HIGHCVSS 7.4Description
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.
Timeline
Published:September 18th, 2026 8:17 AM
Last modified:November 4th, 2026 3:17 PM
CVSS Scoring
CVSS v3: 7.4 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
References & Reports
Advisories, patches, and third-party reports
- https://access.redhat.com/errata/RHSA-2026:83082
- https://access.redhat.com/errata/RHSA-2026:83520
- https://access.redhat.com/errata/RHSA-2026:85234
- https://access.redhat.com/errata/RHSA-2026:92408
- https://access.redhat.com/errata/RHSA-2026:95221
- https://access.redhat.com/security/cve/CVE-2026-89058
- https://bugzilla.redhat.com/show_bug.cgi?id=2519775
- https://github.com/resteasy/resteasy/commit/efeb2b7
- https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3
- https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3
Source: NIST NVD · Data may lag official sources by up to one minute