Description
A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As a result, one user may receive tokens that belong to another user.
References (7)
Scores
CVSS v3
6.0
EPSS
0.0001
EPSS Percentile
3.2%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-384
Status
published
Products (8)
Keycloak/keycloak
< 26.0.0
org.keycloak/keycloak-services
0 - 26.0.0Maven
Red Hat/Red Hat build of Keycloak 26.2
26.2-12
Red Hat/Red Hat build of Keycloak 26.2
26.2.11-1
Red Hat/Red Hat build of Keycloak 26.2.11
Red Hat/Red Hat build of Keycloak 26.4
26.4-3
Red Hat/Red Hat build of Keycloak 26.4
26.4.4-1
Red Hat/Red Hat build of Keycloak 26.4.4
Published
Oct 28, 2025
Tracked Since
Feb 18, 2026