CVE WatchJul 31, 2026

CVE-2026-18211

A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing

CVSS

4.2

Medium

EPSS

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KEV

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Exploit Today

0-100

Published: Jul 31, 2026 · Last modified: Jul 31, 2026 · CWE-20

EPSS · 30d

Not enough EPSS history yet.

Technical description

A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on client configurations, such as requiring encrypted connections for redirect URIs. Due to an improper check that only looks at the start of a web address rather than properly verifying the host, an attacker can bypass these security restrictions by using a specially crafted domain name. This could allow an attacker to intercept sensitive authentication codes over unencrypted connections.

Official references

Related CVEs

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