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CVE-2026-23552

Apache Camel vulnerability

9.1 CRITICALPublic exploitEPSS 0.59%
  1. Published23 Feb 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Apache Camel≥ 4.15.0 < 4.18.0

Remediation

Fixed in
Apache Camel≥ 4.18.0

References

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Frequently asked

Is CVE-2026-23552 being actively exploited?

CVE-2026-23552 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.59%.

How severe is CVE-2026-23552?

CVE-2026-23552 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.59% probability of exploitation.

Which products are affected by CVE-2026-23552?

Affected products include Apache Camel.

How do I fix CVE-2026-23552?

Upgrade affected software to a fixed version, for example Apache Camel 4.18.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.