CVE-2026-89058
Publication date 21 September 2026
Last updated 21 September 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| resteasy | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| resteasy3.0 | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
7.4 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-89058
- https://bugzilla.redhat.com/show_bug.cgi?id=2519775
- https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3
- https://redhat.atlassian.net/browse/RESTEASY-3796
- https://access.redhat.com/security/cve/CVE-2026-89058
- https://github.com/resteasy/resteasy/commit/efeb2b7