Improper Input Validation in Apache Camel's Atmosphere Websocket Component
CVE-2026-71300

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Camel
Vendor
CVE Published:
24 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-71300?

An improper input validation vulnerability exists in Apache Camel's Atmosphere Websocket component, affecting several versions. This issue allows external senders to manipulate message delivery by injecting harmful values into specific headers. When bridging an HTTP consumer into an atmosphere-websocket producer, an attacker can exploit this vulnerability to control which connected WebSocket client receives messages, potentially leading to unauthorized information disclosure and incorrect message routing. To mitigate this risk, users must update to the latest version, specifically version 4.22.0 or higher for general releases, and 4.14.9 or 4.18.4 for LTS, or implement header-stripping measures at the trust boundary.

Affected Version(s)

Apache Camel 4.0.0 < 4.14.9

Apache Camel 4.15.0 < 4.18.4

Apache Camel 4.19.0 < 4.22.0

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-2026-71300
Created by oscerd

References

https://camel.apache.org/security/CVE-2026-71300.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

Barak Srour from Apiiro
Andrea Cosentino
.