Description
Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC. As a result an attacker with access to service provider backend could hijack user’s browser session.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | keycloak | affects up to 6.0.0 version | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Single Sign On 7 | rh-sso7-keycloak +1 | 3.4.17-1.Final_redhat_00001.1.jbcs.el6 | RHSA-2019:0857, RHSA-2019:0856 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-core | < 6.0.0 | 6.0.0 | GHSA-gc52-xj6p-9pxp |
Advisories 2
- RHSA-2019:0857 Red Hat Security Advisory: Red Hat Single Sign-On 7.2.7 security update on RHEL 6 Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2019:0856 Red Hat Security Advisory: Red Hat Single Sign-On 7.2.7 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Jun 29, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3868
- 108061 vdb-entry
- RHSA-2019:1140 vendor-advisory
- RHSA-2019:2998 vendor-advisory