Description
A denial of service vulnerability was found in Keycloak that could allow an administrative user with the right to change realm settings to disrupt the service. This action is done by modifying any of the security headers and inserting newlines, which causes the Keycloak server to write to a request that has already been terminated, leading to the failure of said request.
Scores
CVSS v3
6.5
EPSS
0.0005
EPSS Percentile
14.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-693
Status
published
Products (7)
org.keycloak/keycloak-quarkus-server
0 - 26.0.8Maven
Red Hat/Red Hat build of Keycloak 26.0
26.0-7
Red Hat/Red Hat build of Keycloak 26.0
26.0-8
Red Hat/Red Hat build of Keycloak 26.0
26.0.8-1
Red Hat/Red Hat JBoss Enterprise Application Platform 8
Red Hat/Red Hat JBoss Enterprise Application Platform Expansion Pack
Red Hat/RHBK 26.0.8
Published
Jan 14, 2025
Tracked Since
Feb 18, 2026