# 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. - **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 19 May 2026 - **Updated:** 15 Jul 2026 - **Also known as:** GHSA-8364-hfqj-pwm6 ## 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. Weakness: CWE-791 (Incomplete Filtering of Special Elements), CWE-178 (Improper Handling of Case Sensitivity) ## 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 | Ecosystem | 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: 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. ## 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: - Reproducer for CVE-2026-47323: Apache Camel CXF/Knative HeaderFilterStrategy missing inbound filtering, enabling Camel control-header injection (RCE via camel-exec) through CXF-RS/CXF-SOAP/Knative endpoints (fixed in 4.14.6/4.18.2/4.19.0) (github_poc): https://github.com/oscerd/CVE-2026-47323 ## Other vulnerabilities in Apache Camel - [CVE-2026-33453](https://insights.sbomify.com/CVE-2026-33453/): Apache camel-coap allows header injection that can lead to remote code execution (critical 10.0) - [CVE-2026-40453](https://insights.sbomify.com/CVE-2026-40453/): Apache Camel has an incomplete fix for CVE-2025-27636 (critical 9.9) - [CVE-2026-80351](https://insights.sbomify.com/CVE-2026-80351/): Apache Camel K: Camel K Tenant repositories reach Maven execution inside operator pod (critical 9.8) - [CVE-2026-80352](https://insights.sbomify.com/CVE-2026-80352/): Apache Camel K: Camel K Master trait serviceAccountName YAML injection lets CR author apply arbitrary objects (critical 9.8) - [CVE-2026-71300](https://insights.sbomify.com/CVE-2026-71300/): Apache Camel: Camel-Atmosphere-Websocket: WebSocket dispatch header injection (critical 9.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-47323 and fix it if it is affected. What it is: 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. Exploitation: There is no known exploitation of CVE-2026-47323 in the wild and no public exploit code. Affected packages and fixed versions: - org.apache.camel:camel-cxf-rest (Maven): affected from 3.18.0; fixed in 4.14.6 - org.apache.camel:camel-cxf-rest (Maven): affected from 3.18.0; fixed in 4.14.6 - org.apache.camel:camel-cxf-rest (Maven): affected from 4.15.0; fixed in 4.18.2 - org.apache.camel:camel-cxf-rest (Maven): affected from 4.15.0; fixed in 4.18.2 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-47323/ (Markdown: https://insights.sbomify.com/CVE-2026-47323/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-47323 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-47323 - OSV: https://osv.dev/vulnerability/CVE-2026-47323 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-47323/ Summaries are generated and may contain mistakes; the official description above is the record.