CVE-2026-23552: Apache Camel KeycloakSecurityPolicy Does Not Validate Issuer Vulnerability

CRITICAL
Advisory Identifier: GHSA-c3f3-cc42-xr9v
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CVSS 9.1
CWE-346
Published
Advisory Summary

CVE-2026-23552 is a CRITICAL (CVSS 9.1) keycloaksecuritypolicy does not validate issuer vulnerability (CWE-346: Origin Validation Error) affecting Apache Camel libraries in the Maven ecosystem. The issue involves keycloaksecuritypolicy does not validate issuer of jwt tokens against configured realm. Remediation is available by upgrading affected packages to version 4.18.0.

CVE-2026-23552 at a Glance

CVE Identifier CVE-2026-23552
GHSA Identifier GHSA-c3f3-cc42-xr9v
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-346: Origin Validation Error
Affected Product Apache Camel
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-23552

To remediate this vulnerability, upgrade all affected Apache Camel dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.camel:camel-keycloak fixed: 4.18.0 
<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-keycloak</artifactId>
    <version>4.18.0</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.apache.camel

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-23552, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.camel

Analyze the terminal output to locate any version of Apache Camel in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.18.0), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.camel command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-346: Origin Validation Error, where the product does not properly verify that the source of data or communication is valid. In Apache Camel, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-23552 Affected Apache Camel Versions

1 component(s)
Fixed Versions:
4.18.0
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.camel:camel-keycloak
maven/org.apache.camel/camel-keycloak
Maven
≥ 4.15.0
< 4.18.0
4.18.0

References

NVD — CVE-2026-23552 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23552
Security Fix Commit FIX COMMIT
https://github.com/apache/camel/commit/c1ed776e3a4fa23d15acf4b9a48fdf758d4316ff
Apache Camel Security Information SECURITY
https://camel.apache.org/security/CVE-2026-23552.html
Apache Camel Source Repository REPOSITORY
https://github.com/apache/camel
Apache Camel Source Repository REPOSITORY
https://github.com/oscerd/CVE-2026-23552
issues.apache.org/jira/browse/camel-2... WEB
https://issues.apache.org/jira/browse/CAMEL-22854
Apache Camel Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/02/18/7

Frequently Asked Questions

What is CVE-2026-23552?
CVE-2026-23552 is a security vulnerability in Apache Camel involving KeycloakSecurityPolicy does not validate issuer of JWT tokens against configured realm under CWE-346: Origin Validation Error.
Which Apache Camel versions are affected?
Affected versions include releases prior to 4.18.0 across affected packages: org.apache.camel:camel-keycloak.
What version fixes CVE-2026-23552?
Upgrading to 4.18.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is camel-keycloak affected?
Yes, org.apache.camel:camel-keycloak is affected in releases prior to 4.18.0. Upgrade your dependency to 4.18.0 or later.
What is the CVSS score of CVE-2026-23552?
CVE-2026-23552 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-23552?
CVE-2026-23552 is classified under CWE-346: Origin Validation Error (The product does not properly verify that the source of data or communication is valid.).
How can I check Maven dependencies for CVE-2026-23552?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.camel'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-c3f3-cc42-xr9v",
  "modified" : "2026-02-25T18:04:33Z",
  "published" : "2026-02-23T09:31:23Z",
  "aliases" : [ "CVE-2026-23552" ],
  "summary" : "Apache Camel: KeycloakSecurityPolicy does not validate issuer of JWT tokens against configured realm",
  "details" : "Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy Apache Camel Keycloak component. \n\nThe 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.\nThis issue affects Apache Camel: from 4.15.0 before 4.18.0.\n\nUsers are recommended to upgrade to version 4.18.0, which fixes the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.camel:camel-keycloak"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.15.0"
      }, {
        "fixed" : "4.18.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-23552"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/camel/commit/c1ed776e3a4fa23d15acf4b9a48fdf758d4316ff"
  }, {
    "type" : "WEB",
    "url" : "https://camel.apache.org/security/CVE-2026-23552.html"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/camel"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/oscerd/CVE-2026-23552"
  }, {
    "type" : "WEB",
    "url" : "https://issues.apache.org/jira/browse/CAMEL-22854"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/02/18/7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-346" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-25T18:04:33Z",
    "nvd_published_at" : "2026-02-23T09:17:00Z"
  }
}