Message Header Injection Vulnerability in Apache Camel CXF and Knative
CVE-2026-47323

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Camel
Vendor
CVE Published:
19 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-47323?

The implementations of HeaderFilterStrategy in Apache Camel, specifically CxfRsHeaderFilterStrategy and KnativeHttpHeaderFilterStrategy, fail to appropriately filter inbound headers, allowing unauthenticated attackers to inject internal Camel headers through HTTP requests. This vulnerability can lead to the overriding of key configuration values, causing potential remote code execution and arbitrary file write vulnerabilities when messages are processed by header-driven components. It is crucial for users running affected versions to upgrade to version 4.19.0 or to the latest LTS releases to mitigate these risks.

Affected Version(s)

Apache Camel 3.18.0 < 4.14.6

Apache Camel 4.15.0 < 4.18.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-47323
Created by oscerd

References

https://camel.apache.org/security/CVE-2026-47323.html
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Quac Tran
.