CVE-2018-10912

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-07-23 · updated 2026-06-17
Weakness: CWE-835

Description

keycloak before version 4.0.0.final is vulnerable to a infinite loop in session replacement. A Keycloak cluster with multiple nodes could mishandle an expired session replacement and lead to an infinite loop. A malicious authenticated user could use this flaw to achieve Denial of Service on the server.

Affected products

Keycloak: before 4.0.0 — fixed in 4.0.0
Red Hat Single Sign-On: 7.2

How to fix

Upgrade to a fixed version: Keycloak 4.0.0. Check the vendor advisory for mitigations.

References

https://access.redhat.com/errata/RHSA-2018:2428
https://access.redhat.com/errata/RHSA-2019:0877
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10912
https://access.redhat.com/errata/RHSA-2018:2428
https://access.redhat.com/errata/RHSA-2019:0877
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10912

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