Origin Validation Error Affecting pki-resteasy-core package, versions <0:3.0.26-20.el9_8.1


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.26% (17th percentile)

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  • Snyk IDSNYK-ALMALINUX9-PKIRESTEASYCORE-21349198
  • published21 Oct 2026
  • disclosed19 Oct 2026

Introduced: 19 Oct 2026

NewCVE-2026-89058  (opens in a new tab)
CWE-346  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 pki-resteasy-core to version 0:3.0.26-20.el9_8.1 or higher.
This issue was patched in ALSA-2026:85234.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pki-resteasy-core package and not the pki-resteasy-core package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1