DNS Rebinding Affecting org.keycloak:keycloak-services package, versions [12.0.0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGKEYCLOAK-18751614
- published13 Aug 2026
- disclosed28 Jul 2026
- creditUnknown
Introduced: 28 Jul 2026
NewCVE-2026-18206 (opens in a new tab)How to fix?
There is no fixed version for org.keycloak:keycloak-services.
Overview
org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services.
Affected versions of this package are vulnerable to DNS Rebinding in the client host restriction logic. An attacker can bypass wildcard domain restrictions on client registration or updates by controlling the reverse DNS for their connection and presenting a hostname that merely ends with the configured suffix, such as *.example.com, even when it is not a real subdomain. This lets an unauthorized party modify clients in realms that rely on host-based allowlists, breaking the intended restriction on who can register or update client settings.