CVE-2019-10157

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-06-12 · updated 2026-06-17
Weakness: CWE-345

Description

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.

Affected products

Keycloak: before 4.8.3 — fixed in 4.8.3
Red Hat Single Sign-On: before 7.3.2 — fixed in 7.3.2

How to fix

Upgrade to a fixed version: Keycloak 4.8.3; Red Hat Single Sign-On 7.3.2. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/108734
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10157
http://www.securityfocus.com/bid/108734
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10157

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