CVE-2026-117859
Medium
Description
A flaw was found in the Pushed Authorization Request PAR implementation of the keycloak-services component. The issue occurs when an authentication flow is restarted, which incorrectly clears the internal markers used to track PAR consumption while leaving the request active. This allows an attacker to reuse the same authorization request to obtain multiple access tokens, bypassing security requirements for single-use requests.
SeverityMedium
CVSS5.4
Exploit probability—
Product
Red Hat Build of Keycloak
PublishedOct 29, 2026
First seenNov 4, 2026
Weakness typeCWE-670CWE-670
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Build of Keycloak | No range specified | — |
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