How severe is CVE-2026-23552?

CVE-2026-23552 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-23552 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23552?

CVE-2026-23552 affects Apache Camel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23552?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-23552 have an EU (EUVD) identifier?

Yes. CVE-2026-23552 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7591.

When was CVE-2026-23552 published?

CVE-2026-23552 was published on 2026-02-23 and last updated on 2026-06-17.

CVE-2026-23552

CVE-2026-23552 is a critical-severity vulnerability in Apache Camel with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7591
Weakness: CWE-346
Affected product: Apache Camel
Published: 2026-02-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-23552?: 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.
How severe is CVE-2026-23552?: CVE-2026-23552 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-23552 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23552?: CVE-2026-23552 affects Apache Camel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23552?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-23552 have an EU (EUVD) identifier?: Yes. CVE-2026-23552 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7591.
When was CVE-2026-23552 published?: CVE-2026-23552 was published on 2026-02-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*

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