Apache Camel 3.x-4.x Header Injection via Inbound Filter Omission
CVE-2026-47323 Published on May 19, 2026

Apache Camel: Camel-CXF Message Header Injection via Missing Inbound Filtering
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.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-47323 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Types

Improper Handling of Case Sensitivity

The software does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results.

Incomplete Filtering of Special Elements

The software receives data from an upstream component, but does not completely filter special elements before sending it to a downstream component.


Products Associated with CVE-2026-47323

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Apache Camel
 
Red Hat Serverless
 
Red Hat Camel Quarkus
 
Red Hat Camel Spring Boot
 
Red Hat Jboss Fuse
 
Red Hat Jbosseapxp
 
Red Hat Jboss Enterprise Bpms Platform
 

Affected Versions

Apache Software Foundation Apache Camel: Red Hat OpenShift Serverless: Red Hat build of Apache Camel 4 for Quarkus 3: Red Hat build of Apache Camel for Spring Boot 4: Red Hat Fuse 7: Red Hat JBoss Enterprise Application Platform Expansion Pack: Red Hat Process Automation 7:

Exploit Probability

EPSS
0.98%
Percentile
57.77%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.