CVE-2025-27636 - Bypass/Injection Vulnerability in Apache Camel-Bean Component Under Particular Conditions

A critical security vulnerability (CVE-2025-27636) has been identified in the Apache Camel-Bean component under specific conditions. This post will delve into the details of this vulnerability, including the affected versions, how the vulnerability can be exploited, and recommendations on how to mitigate the risk associated with this issue.

camel-netty-http

* In the route, the exchange will be routed to a camel-bean producer, which is only affected if used in conjunction with the above HTTP servers and Camel components.

* The bean that can be called has more than one method implemented.

Under these conditions, an attacker could potentially forge a Camel header name and cause the bean component to invoke other methods in the same bean. This occurs due to a bug in the default filtering mechanism that only blocks headers starting with "Camel", "camel", or "org.apache.camel.".

Mitigation

To workaround this vulnerability in your Camel applications, you can remove the headers in your Camel routes. There are several ways to achieve this, either globally or per route. One approach is to use the removeHeaders EIP (Enterprise Integration Pattern) to filter out any headers that do not start with the allowed prefixes "Camel", "camel", or "org.apache.camel.". Here's a code snippet for reference:

from("direct:start")
    // Remove all headers not starting with Camel, camel, or org.apache.camel.
    .removeHeaders("^(?!Camel|camel|org\\.apache\\.camel\\.).*")
    // Your routing logic
    .to("bean:yourBean")
    .log("Invoked bean method: ${header.CamelInvokedMethod}");

By removing the unwanted headers, you effectively mitigate the risk of this vulnerability being exploited.

Conclusion

While this vulnerability may not affect all Apache Camel users, it is crucial to be aware of it and take appropriate measures to mitigate the risk it poses. By upgrading to the latest recommended Apache Camel versions and filtering header names in your Camel routes, you can protect your applications from potential bypass/injection attacks.

For more information and updates on this vulnerability, please refer to the official Apache Camel security advisory.

Timeline

Published on: 03/09/2025 13:15:34 UTC
Last modified on: 03/10/2025 19:15:41 UTC