CVE-2026-23552
Critical
Description
Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy Apache Camel Keycloak component. The Camel-Keycloak KeycloakSecurityPolicy does not validate the iss (issuer) claim of JWT tokens against the configured realm. A token issued by one Keycloak realm is silently accepted by a policy configured for a completely different realm, breaking tenant isolation. This issue affects Apache Camel: from 4.15.0 before 4.18.0. Users are recommended to upgrade to version 4.18.0, which fixes the issue.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Apache Camel
PublishedFeb 23, 2026
First seenFeb 23, 2026
Weakness typeCWE-346CWE-346
How to fix
Update
- apache camel4.18.0 or later
- org.apache.camel:camel-keycloak4.18.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache camel | 4.15.0 ≤ v < 4.18.0 | 4.18.0 |
| org.apache.camel:camel-keycloakMaven | 4.15.0 ≤ v < 4.18.0 | 4.18.0 |
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