🔐 CVE Alert

CVE-2026-89058

HIGH 7.4

Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config

CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
0th

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.

Vendor red hat
Published Sep 18, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

Affected Versions

Red Hat /
0 < 6.2.19.Final 7.0.0.Alpha1 < 7.0.5.Final

References

NVD ↗ CVE.org ↗ EPSS Data ↗
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-89058 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2519775 github.com: https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3

Credits

Red Hat would like to thank Yu Bao (PayPal Cyber Security Team) for reporting this issue.