Keycloak/Red Hat SSO is widely used for enterprise IAM. This flaw lets authenticated users bypass policy enforcement to reach admin/private endpoints, posing broad access control risk.
CVE-2026-74909
Keycloak policy enforcer bypass via encoded characters allows unauthorized access.
Is CVE-2026-74909 being exploited?
Not confirmed. CVE-2026-74909 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-74909?
CVE-2026-74909 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74909?
Yes. A fix has been recorded for CVE-2026-74909. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74909 affect?
CVE-2026-74909 affects Keycloak (policy enforcer), Red Hat Single Sign-On / Red Hat SSO. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74909?
Apply vendor patches immediately; block/normalize encoded special chars in request handling.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated users can use encoded chars (e.g., semicolons, traversal) to bypass the policy enforcer and access administrative or private application endpoints.
Immediate action required