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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | keycloak | 4.8.3 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | keycloak-connect | < 4.8.3 | 4.8.3 | GHSA-68hw-vfh7-xvg8 |
Advisories 1
- WID-SEC-2022-1947 Red Hat Single Sign On: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2026