Insufficient Session Expiration in Keycloak - CVE-2026-9705
Published: June 29, 2026
Vulnerability identifier: #VU135692
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-9705
CWE-ID: CWE-613
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information and compromise integrity.
The vulnerability exists due to insufficient session expiration in the client registration service when processing requests with a previously issued registration access token. A remote attacker can use a stale registration access token to re-enable a disabled client and reset its secret to disclose sensitive information and compromise integrity.
Exploitation requires possession of a previously issued registration access token for the client.
Affected software
Keycloak
Red Hat build of Keycloak
Red Hat build of Keycloak
How to mitigate CVE-2026-9705
Install security update from vendor's website.
Keycloak - update to 26.6.4
Red Hat build of Keycloak - addressed in versions 26.4.13, 26.6.4
Red Hat build of Keycloak - addressed in versions 26.4.13, 26.6.4