---
title: "CVE-2026-47323: Camel-CXF and Camel-Knative Message Header are Vulnerable to Injection via Missing Inbound Filtering"
url: https://erroneo.us/security/cve/CVE-2026-47323/
description: "CVE-2026-47323 (org.apache.camel:camel-cxf-rest (Maven)): Camel-CXF and Camel-Knative Message Header Injection via Missing Inbound Filtering The CXF and…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-19
date_modified: 2026-10-05
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-47323"
kev: false
cvss: 9.8
epss: 0.01605
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-47323: Camel-CXF and Camel-Knative Message Header are Vulnerable to Injection via Missing Inbound Filtering

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.6% , percentile 76: FIRST’s model estimates a 1.6% chance of exploitation activity in the next 30 days, higher than 76% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.apache.camel:camel-cxf-rest (Maven) >= 3.18.0, < 4.14.6, fixed in 4.14.6 ; org.apache.camel:camel-cxf-rest (Maven) >= 4.15.0, < 4.18.2, fixed in 4.18.2 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- Maven `org.apache.camel:camel-cxf-rest` >= 3.18.0, < 4.14.6 → fixed: 4.14.6
- Maven `org.apache.camel:camel-cxf-rest` >= 4.15.0, < 4.18.2 → fixed: 4.18.2

## Affected products (CVE record)

- Apache Software Foundation Apache Camel: 3.18.0 < 4.14.6, 4.15.0 < 4.18.2

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- redhat-SADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.60% probability of exploitation activity in the next 30 days; percentile 76.

## Sources

- [camel.apache.org](https://camel.apache.org/security/CVE-2026-47323.html)
- [GitHub Advisory GHSA-8364-hfqj-pwm6](https://github.com/advisories/GHSA-8364-hfqj-pwm6)
- [CVE.org record CVE-2026-47323](https://www.cve.org/CVERecord?id=CVE-2026-47323)
- [NVD entry CVE-2026-47323](https://nvd.nist.gov/vuln/detail/CVE-2026-47323)
- [access.redhat.com](https://access.redhat.com/security/cve/CVE-2026-47323)
- [RHBZ#2479869](https://bugzilla.redhat.com/show_bug.cgi?id=2479869)
- [security.access.redhat.com](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47323.json)

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Source page: https://erroneo.us/security/cve/CVE-2026-47323/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt