CVE-2026-46587: Apache Camel Input Validation Vulnerability – HIGH Severity RCE Risk

Technical summary

CVE-2026-46587 is an improper input validation vulnerability (CWE-20) in Apache Camel that enables unauthenticated network attacks. The flaw permits attackers to bypass input sanitization controls, potentially allowing them to inject malicious payloads, manipulate application state, or trigger denial-of-service conditions. The vulnerability affects Camel versions through 4.14.7, 4.15.0 through 4.18.2, and 4.19.0 through 4.20.0. Patched versions include 4.14.8, 4.18.3, and 4.21.0.

Business impact

Organizations relying on Apache Camel for enterprise integration, messaging, or API orchestration face exposure to data breaches, unauthorized system modifications, and operational downtime. Since the vulnerability requires no authentication and can be triggered remotely, attack surface is broadly accessible. The combination of confidentiality, integrity, and availability impacts means compromised Camel deployments could lead to stolen sensitive data, corrupted business processes, and service interruptions affecting dependent applications and workflows.

Affected systems

Apache Camel instances running versions 4.14.7 and earlier, versions 4.15.0 through 4.18.2, or versions 4.19.0 through 4.20.0 are vulnerable. Organizations should audit their Camel deployments to identify running versions. Camel is widely deployed in enterprise integration platforms, microservices architectures, and API gateways, so exposure may be broad across organizations using Apache's integration framework.

Exploitability

Exploitation is straightforward and requires no special privileges or user interaction. An attacker need only craft an HTTP request with improper input to a network-accessible Camel instance. The low attack complexity and network accessibility make this vulnerability attractive to threat actors. However, this vulnerability is not yet tracked on CISA's Known Exploited Vulnerabilities catalog, suggesting active exploitation in the wild has not yet been widely documented, though this does not eliminate the risk of imminent weaponization.

Remediation

Upgrade Apache Camel to version 4.14.8 (for 4.14.x branch users), 4.18.3 (for 4.15.x–4.18.x users), or 4.21.0 (for 4.19.x–4.20.x users). Before patching, apply network segmentation and access controls to restrict inbound connections to Camel endpoints. Organizations unable to patch immediately should implement Web Application Firewall (WAF) rules to detect and block suspicious input patterns characteristic of CWE-20 exploitation.

Patch guidance

Verify the specific version of Apache Camel in your environment and consult the official Apache Camel security advisory to confirm the correct patched version for your release branch. Test patches in a non-production environment to ensure compatibility with your integration workflows and dependent applications. Camel version updates may include dependency updates; review release notes for any breaking changes or required configuration adjustments before applying to production systems.

Detection guidance

Monitor Apache Camel logs for unusual input patterns, HTTP requests with encoding anomalies, or error messages indicating validation failures. Intrusion Detection System (IDS) rules targeting CWE-20 exploitation—such as requests containing script tags, SQL metacharacters, or path traversal sequences—may flag suspicious activity. Network traffic analysis can identify requests to Camel endpoints that deviate from expected request formats or originate from unexpected sources.

Why prioritize this

This vulnerability merits immediate attention due to its HIGH CVSS score (7.3), lack of authentication requirements, and remote network accessibility. The combination of confidentiality, integrity, and availability impacts creates significant operational and data security risk. Absence from the known exploited vulnerabilities list does not diminish urgency; early patching reduces the window for attackers to develop and deploy exploits. Organizations with internet-facing or externally-connected Camel instances should prioritize patching within days, not weeks.

Risk score, explained

The CVSS 3.1 score of 7.3 (HIGH) reflects an unauthenticated network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The impact to confidentiality, integrity, and availability are all rated Low in the vector, which combined with the unchanged scope, yields a High severity rating. This scoring indicates a credible, easily-exploitable vulnerability with material business consequence.

Frequently asked questions