CVEvulnerability

CVE-2026-18211

5.4 MEDIUM Published 2026-07-31 Modified 2026-08-07 Official page ↗
Status
Analyzed
Published
2026-07-31
Last modified
2026-08-07
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.2 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Weaknesses
CWE-20

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.

Affected configurations

• redhat build of keycloak

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References