CVE-2025-30177: Apache Camel: Camel-Undertow Message Header Injection via Improper Filtering

[Andrea Cosentino <acosentino () apache org>]

Severity: moderate

Affected versions:

- Apache Camel 4.10.0 before 4.10.3
- Apache Camel 4.8.0 before 4.8.6

Description:

Bypass/Injection vulnerability in Apache Camel in Camel-Undertow component under particular conditions.

This issue affects Apache Camel: from 4.10.0 before 4.10.3, from 4.8.0 before 4.8.6.

Users are recommended to upgrade to version 4.10.3 for 4.10.x LTS and 4.8.6 for 4.8.x LTS.

Camel undertow component is vulnerable to Camel message header injection, in particular the custom header filter 
strategy used by the component only filter the "out" direction, while it doesn't filter the "in" direction.


This allows an attacker to include Camel specific headers that for some Camel components can alter the behaviour such 
as the camel-bean component, or the camel-exec component.

This issue is being tracked as CAMEL-21876 

Credit:

Mark Thorson of AT&T (finder)
Mark Thorson of AT&T (reporter)

References:

https://camel.apache.org/security/CVE-2025-27636.html
https://camel.apache.org/security/CVE-2025-29891.html
https://camel.apache.org/
https://www.cve.org/CVERecord?id=CVE-2025-30177
https://issues.apache.org/jira/browse/CAMEL-21876