High (7.1) in redhat. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in org.keycloak:keycloak-services 23.0.3.
A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.
Severity
CVSS 3.1
7.1 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS
0.9% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-31)