Authorization Request Vulnerability in Keycloak-Services Component by Red Hat
CVE-2026-117859

5.4MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Keycloak
Red Hat Single Sign-on 7
Vendor
CVE Published:
29 October 2026

What is CVE-2026-117859?

A vulnerability exists within the Pushed Authorization Request (PAR) implementation of the keycloak-services component from Red Hat. The flaw is triggered when an authentication flow is restarted, which improperly resets the markers that monitor the utilization of PAR. This oversight leaves the request active, potentially allowing an attacker to reuse the same authorization request. Consequently, this can lead to multiple access tokens being issued, contravening the intended single-use requirement and posing significant security risks.

References

https://access.redhat.com/security/cve/CVE-2026-117859
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2561991
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Ahmed Hesham Salah (SecuriCIP) for reporting this issue.
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