CVE-2026-47323 Apache Camel: Camel-CXF Message Header Injection via Missing Inbound Filtering
Attackers can inject internal headers via HTTP requests to trigger remote code execution or arbitrary file writes in Apache Camel routes using exec or file components.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47323?
CVE-2026-47323 is a critical code injection vulnerability in Apache Camel, published on 19 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Camel-CXF and Camel-Knative Message Header Injection via Missing Inbound Filtering
The CXF and Knative HeaderFilterStrategy implementations (CxfRsHeaderFilterStrategy in camel-cxf-rest, CxfHeaderFilterStrategy in camel-cxf-transport, and KnativeHttpHeaderFilterStrategy in camel-knative-http) only filter outbound Camel-internal headers via setOutFilterStartsWith, while not configuring inbound filtering via setInFilterStartsWith. As a result, an unauthenticated attacker can inject Camel-internal headers (e.g. CamelExecCommandExecutable, CamelFileName) via HTTP requests to CXF-RS or CXF-SOAP endpoints. When a route forwards messages from these endpoints to header-driven components such as camel-exec or camel-file, the injected headers override configured values, enabling remote code execution or arbitrary file writes. This is the same pattern that was previously addressed in camel-undertow (CVE-2025-30177), the broader incoming-header filter (CVE-2025-27636 and CVE-2025-29891), and non-HTTP strategies (CVE-2026-40453).
This issue affects Apache Camel: from 3.18.0 before 4.14.6, from 4.15.0 before 4.18.2.
Users are recommended to upgrade to version 4.19.0, which fixes the issue. If users are on the 4.18.x LTS releases stream, then they are suggested to upgrade to 4.18.2. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6.
Which versions are affected by CVE-2026-47323?
4 open source packages ship an affected version, including org.apache.camel:camel-cxf-rest. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.camel:camel-cxf-rest Maven | From 3.18.0 | 4.14.6 |
org.apache.camel:camel-cxf-rest Maven | From 3.18.0 | 4.14.6 |
org.apache.camel:camel-cxf-rest Maven | From 4.15.0 | 4.18.2 |
org.apache.camel:camel-cxf-rest Maven | From 4.15.0 | 4.18.2 |
Products include Apache Camel.
How do I fix CVE-2026-47323?
Upgrade org.apache.camel:camel-cxf-rest to a fixed version for your release line: 4.14.6 or 4.18.2.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-47323 being exploited?
There is no known exploitation of CVE-2026-47323 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Apache Camel
- CVE-2026-33453 Apache camel-coap allows header injection that can lead to remote code execution
- CVE-2026-40453 Apache Camel has an incomplete fix for CVE-2025-27636
- CVE-2026-80351 Apache Camel K: Camel K Tenant repositories reach Maven execution inside operator pod
- CVE-2026-80352 Apache Camel K: Camel K Master trait serviceAccountName YAML injection lets CR author apply arbitrary objects
- CVE-2026-71300 Apache Camel: Camel-Atmosphere-Websocket: WebSocket dispatch header injection
Sources
Also known as GHSA-8364-hfqj-pwm6.