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Fencer Vulns
medium 4.7

CVE-2019-10157 json

Forced Logout in keycloak-connect

published 2019-06-12 7 y ago modified 2026-06-17 4 mo ago also GHSA-68hw-vfh7-xvg8 , EUVD-2019-0509

cvss
4.7
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm keycloak-connect 4.8.3
  • redhat keycloak 4.8.3
  • redhat single_sign-on 7.3.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-10157 updated cvss 4.7

keycloak: Node.js adapter internal NBF can be manipulated leading to DoS.

  • Red Hat Mobile Application Platform 4 keycloak
    affected: no fix planned “Out of support scope”
  • Red Hat Single Sign-On 7 rh-sso7-keycloak rh-sso7-keycloak
    affected: no fix available
  • Red Hat Single Sign-On 7.3.2 zip
    fixed: vendor fix RHSA-2019:1456
  • Red Hat Fuse 7 keycloak keycloak Red Hat OpenShift Application Runtimes keycloak keycloak
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 4.7 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm keycloak-connect
<4.8.3
4.8.3

Affected products

  • Red Hat keycloak

Classification

Weakness
  • CWE-345 Insufficient Verification of Data Authenticity
  • CWE-287 Improper Authentication

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.