What is CVE-2018-10912?

CVE-2018-10912 is a medium-severity vulnerability in [Unknown] Keycloak, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 4.9/10. Published 2018-07-23.

How severe is CVE-2018-10912?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in [Unknown] Keycloak

CVE-2018-10912

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.

Published 2018-07-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

[Unknown] Keycloak — versions Keycloak 4.0.0.Final
Red Hat Keycloak
Red Hat Single Sign-On — versions 7.2

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

access.redhat.com/errata/RHSA-2018:2428 (vendor-advisory, Vendor Advisory)
bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
access.redhat.com/errata/RHSA-2019:0877 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2018-10912?: CVE-2018-10912 is a medium-severity vulnerability in [Unknown] Keycloak, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 4.9/10. Published 2018-07-23.
How severe is CVE-2018-10912?: Medium severity. CVSS v3 base score is 4.9 out of 10.