What is CVE-2019-10157?

CVE-2019-10157 is a medium-severity vulnerability in Red Hat Keycloak, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.7/10. Published 2019-06-12.

How severe is CVE-2019-10157?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Auth bypass in Red Hat Keycloak

CVE-2019-10157

It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.

Published 2019-06-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (9.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

References

bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
www.securityfocus.com/bid/108734 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2019-10157?: CVE-2019-10157 is a medium-severity vulnerability in Red Hat Keycloak, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.7/10. Published 2019-06-12.
How severe is CVE-2019-10157?: Medium severity. CVSS v3 base score is 4.7 out of 10.