3.4
Faible
CVE-2026-18209 A flaw was found in the keycloak-services component of Keycloak, which handles OpenID Connect (OIDC) authentication…
Description
A flaw was found in the keycloak-services component of Keycloak, which handles OpenID Connect (OIDC) authentication flows. The issue occurs because the security check designed to prevent HTTP parameter pollution only inspects the query portion of a redirect URL and ignores the fragment portion. When a client is configured with a wildcard redirect URI, an attacker can use this to inject duplicate security parameters into the login response. If a client application is not configured correctly, it might trust the attacker's injected data instead of the real security information from Keycloak, leading to session fixation or account confusion.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Red Hat Build of Keycloak | Versions non publiées | |
| Red Hat Data Grid 8 | Versions non publiées | |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Versions non publiées | |
| Red Hat Single Sign-On 7 | Versions non publiées | |
| Red Hat build of Keycloak 26.6 26.6 | premières → < 26.6-20 | 26.6-20 |
| Red Hat build of Keycloak 26.6.7 | Versions non publiées |
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6.4
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