CVE-2026-49042: Apache Camel Input Validation Vulnerability (CVSS 7.3)

Technical summary

CVE-2026-49042 is classified as an improper input validation issue (CWE-20) in Apache Camel affecting versions 4.8.0 through 4.18.2 and 4.19.0 through 4.20.0. The vulnerability stems from insufficient validation of user-supplied input, enabling attackers to send specially crafted requests that bypass security controls. The network-accessible attack vector, combined with no authentication requirement and low attack complexity, results in a CVSS 3.1 score of 7.3 (HIGH severity). The vulnerability impacts confidentiality, integrity, and availability with limited scope, indicating potential for cross-system impact depending on the deployment architecture.

Business impact

Organizations running affected Camel versions face risk of unauthorized data access, message manipulation, or integration pipeline disruption. If Camel is used as a middleware component processing sensitive data—common in financial, healthcare, or logistics sectors—this vulnerability could expose personally identifiable information or enable transaction tampering. Unpatched systems remain attractive targets for opportunistic network-based attacks, and the high CVSS score reflects the combination of remote exploitability and low barrier to attack execution.

Affected systems

Apache Camel versions 4.8.0 through 4.18.2 and 4.19.0 through 4.20.0 are vulnerable. Organizations should audit their dependency trees and container images to identify running instances. Spring Boot applications embedding Camel, microservice platforms, and enterprise service buses are common deployment contexts. The scope is limited to systems actively running these specific Camel versions; patched and older versions outside these ranges are not affected.

Exploitability

This vulnerability exhibits high exploitability characteristics: it requires no authentication, can be triggered over the network, and demands minimal technical complexity to execute. The attack surface is broad given Camel's widespread use in integration architectures. However, exploitation effectiveness depends on the specific application logic and what happens downstream when malformed input reaches message handlers. No public exploit code or KEV designation exists as of the advisory date, reducing immediate threat velocity but not eliminating the underlying risk.

Remediation

Upgrade to Apache Camel version 4.18.3 or 4.21.0, which resolve the input validation flaw. For organizations unable to patch immediately, implement network-level controls restricting access to Camel endpoints to trusted sources only, and monitor ingress traffic for malformed requests. Review integration workflows to identify which message types or data flows could be compromised if input validation is bypassed, prioritizing patches for high-criticality integrations.

Patch guidance

Apache Camel users on version 4.18.x should upgrade to 4.18.3. Users on version 4.19.0 or 4.20.0 should upgrade to 4.21.0. Before deploying patches in production, verify compatibility with custom extensions, third-party integrations, and downstream systems. Test patches in a staging environment that mirrors your production topology. For containerized deployments, rebuild images with updated Camel versions and redeploy using your standard release procedures. Monitor application logs post-patch for any behavioral changes in message processing.

Detection guidance

Hunt for Camel deployments by scanning for running processes, container images, or dependency declarations referencing org.apache.camel:camel-core or similar artifacts. Use Software Composition Analysis (SCA) tools to identify exact versions. Monitor network traffic to Camel endpoints for patterns of malformed requests—specifically, check for HTTP requests with unexpected encoding, oversized headers, or payloads that violate schema validation. Enable verbose logging on Camel routes to capture input validation errors. In SIEM systems, correlate Camel error logs with network events to detect exploitation attempts.

Why prioritize this

HIGH priority. The combination of remote network accessibility, zero authentication requirement, and broad deployment across middleware stacks makes this a significant risk. While no active exploit or KEV designation currently exists, the vulnerability's technical characteristics ensure it will attract attention once patches are released and the security community begins analysis. Organizations should treat this with urgency given Camel's role in critical data flows.

Risk score, explained

CVSS 3.1 score of 7.3 (HIGH) reflects an unauthenticated, network-accessible vulnerability with low attack complexity and limited-scope impact on confidentiality, integrity, and availability. The lack of user interaction required increases practical exploitability. The severity balances the ease of attack delivery against the fact that impact is not complete system compromise; however, in integration architectures where Camel processes sensitive data, actual business impact may exceed the CVSS score.

Frequently asked questions