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CVE-2026-9704

CVE-kwetsbaarheidsdetails - eXtreme Datacenter Security Operations

Gepubliceerd 2026-05-27 12:56:00

Laatst bijgewerkt 2026-06-26 06:46:25

Toegewezen door redhat

CVSS-score 6.8

Status PUBLISHED

Beschrijving

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subject_token JSON Web Token (JWT) to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client credentials. This allows the user to gain the permissions of the client's service account, leading to privilege escalation.

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