Quick answers
- Is CVE-2026-96453 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-96453 being exploited in the wild.
- How severe is CVE-2026-96453?
- High severity, with a CVSS score of 8, published 5 November 2026.
- Which products and versions are affected?
- Red Hat Keycloak.
- Is there a fix for CVE-2026-96453?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-96453 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-96453?
- Check whether you run Red Hat Keycloak. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The kcadm tool improperly validates X.509 certificates when a custom truststore is configured; it accepts any self-signed certificate if the hostname matches, bypassing certificate chain verification. This allows a network attacker to perform a man-in-the-middle attack to intercept TLS traffic and steal administrative credentials used for server management. The vulnerability requires network proximity and the use of a custom truststore configuration.
Affected products
- Red Hat Keycloak
Timeline
- 2026-11-05: disclosed