Keycloak vulnerable to session takeover with OIDC offline refreshtokens
An issue was discovered in Keycloak when using a client with the offline_access scope. Reuse of session ids across root and user authentication sessions and a lack of root session validation enabled attackers to resolve a user session attached to a different previously authenticated user.
This issue most affects users of shared computers. Suppose a user logs out of their account (without clearing their cookies) in a mobile app or similar client that includes the offline_access scope, and another user authenticates to the application. In that case, it will share the same root session id, and when utilizing the refresh token, they will be issued a token for the original user.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.keycloak:keycloak-parent | < 20.0.2 | 20.0.2 |
References
- https://github.com/keycloak/keycloak/security/advisories/GHSA-97g8-xfvw-q4hg
- https://nvd.nist.gov/vuln/detail/CVE-2022-3916
- https://access.redhat.com/errata/RHSA-2022:8961
- https://access.redhat.com/errata/RHSA-2022:8962
- https://access.redhat.com/errata/RHSA-2022:8963
- https://access.redhat.com/errata/RHSA-2022:8964
- https://access.redhat.com/errata/RHSA-2022:8965
- https://access.redhat.com/errata/RHSA-2023:1043
- https://access.redhat.com/errata/RHSA-2023:1044
- https://access.redhat.com/errata/RHSA-2023:1045
- https://access.redhat.com/errata/RHSA-2023:1047
- https://access.redhat.com/errata/RHSA-2023:1049
- https://access.redhat.com/security/cve/CVE-2022-3916
- https://bugzilla.redhat.com/show_bug.cgi?id=2141404
- https://github.com/keycloak/keycloak
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-287, CWE-304, CWE-488, CWE-613- Platform
- Java / Kotlin (Maven)
- Package
org.keycloak:keycloak-parent- Disclosed
- 13.12.2022
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-97g8-xfvw-q4hg - CC BY 4.0
Vulnerability history: org.keycloak:keycloak-parent
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 26
- First → latest
- 05.2021 02.2026
- Without a fix
- 6
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 12
- Medium 10
- Low 2
Disclosures per year
- 2021: 1
- 2022: 22
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 2
-
Keycloak vulnerable to session takeover with OIDC offline refreshtokens this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.