Critical (9.1) in redhat keycloak. EPSS 6.0% chance of exploitation in the next 30 days. Fixed in org.keycloak:keycloak-parent 20.0.2.
keycloak: path traversal via double URL encoding. A flaw was found in Keycloak, where it does not properly validate URLs included in a redirect. An attacker can use this flaw to construct a malicious request to bypass validation and access other URLs and potentially sensitive information within the domain or possibly conduct further attacks. This flaw affects any client that utilizes a wildcard in the Valid Redirect URIs field.
Severity
CVSS 3.1
9.1 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
6.0% chance of exploitation in the next 30 days; higher than 93% of CVEs (scores of 2026-10-31)