Apache Camel Security Advisory - CVE-2025-29891

Apache Camel security advisory: CVE-2025-29891

Severity

HIGH

Summary

Camel Message Header Injection through request parameters

Versions affected

Apache Camel 4.10.0 before 4.10.2. Apache Camel 4.8.0 before 4.8.5. Apache Camel 3.10.0 before 3.22.4.

Versions fixed

3.22.4, 4.8.5 and 4.10.2

Description

This vulnerability is present in Camel's default incoming header filter, that allows an attacker to include Camel specific headers that for some Camel components can alter the behaviours such as the camel-bean component, or the camel-exec component. If you have Camel applications that are directly connected to the internet via HTTP, then an attacker could include parameters in the HTTP requests that are sent to the Camel application that get translated into headers. The headers could be both provided as request parameters for an HTTP methods invocation or as part of the payload of the HTTP methods invocation.All the known Camel HTTP component such as camel-servlet, camel-jetty, camel-undertow, camel-platform-http, and camel-netty-http would be vulnerable out of the box.

Notes

The JIRA ticket: https://issues.apache.org/jira/browse/CAMEL-21828 refers to the various commits that resolved the issue, and have more details. This CVE is related to the CVE-2025-27636: while they have the same root cause and are fixed with the same fix, CVE-2025-27636 was assumed to only be exploitable if an attacker could add malicious HTTP headers, while we have now determined that it is also exploitable via HTTP parameters. Like in CVE-2025-27636, exploitation is only possible if the Camel route uses particular vulnerable components.

Mitigation

Users are recommended to upgrade to version 4.10.2 for 4.10.x LTS, 4.8.5 for 4.8.x LTS and 3.22.4 for 3.x releases. Also, users could use removeHeaders EIP, to filter out anything like ‘cAmel, cAMEL’ etc, or in general everything not starting with ‘Camel’, ‘camel’ or ‘org.apache.camel.’.

Credit

This issue was discovered by Citi Cyber Security Operations and reported by Akamai Security Intelligence Group (SIG). This issue was discovered and reported by Mark Thorson of AT&T.

References

PGP signed advisory data: CVE-2025-29891.txt.asc
Mitre CVE Entry: https://www.cve.org/CVERecord?id=CVE-2025-29891