CVE-2026-56140 camel vulnerability
Improper Input Validation vulnerability in Apache Camel AWS SNS component. The camel-aws2-sns component filters Camel headers through a component-specific HeaderFilterStrategy, Sns2HeaderFilterStrategy. Like the sibling Sqs2HeaderFilterStrategy, it originally configured only an outbound filter (setOutFilterPattern, which blocks Camel*, breadcrumbId and org.apache.camel.* headers from being written out) and did not configure an inbound filter rule. For the related camel-aws2-sqs component this inbound gap was exploitable, because the Sqs2Consumer maps inbound SQS message attributes into the Camel Exchange via HeaderFilterStrategy.applyFilterToExternalHeaders, allowing a message sender to inject Camel control headers (tracked as CVE-2026-46456). camel-aws2-sns, by contrast, is producer-only: Sns2Endpoint does not support consumers (createConsumer throws UnsupportedOperationException, 'You cannot receive messages from this endpoint'), so no externally-supplied message attributes are ever mapped inbound into a Camel Exchange through SNS, and the missing inbound filter rule on Sns2HeaderFilterStrategy was therefore not reachable by an attacker. As part of the same fix (CAMEL-23506), an inbound filter rule (setInFilterStartsWith for the Camel namespace) was added to Sns2HeaderFilterStrategy so that its configuration matches the corrected Sqs2HeaderFilterStrategy and the other sibling strategies. This is a defense-in-depth alignment with no known exploit path in camel-aws2-sns. This issue affects Apache Camel: from 4.0.0 before 4.14.8, from 4.15.0 before 4.18.3, from 4.19.0 before 4.21.0. This is a defense-in-depth hardening change with no known exploit path in camel-aws2-sns, which is producer-only, so no urgent action or workaround is required. Users who want the aligned behaviour can upgrade to version 4.21.0, or to 4.14.8 on the 4.14.x LTS releases stream, or to 4.18.3 on the 4.18.x releases stream, which contain the change. As a general best practice, operators should continue to apply least-privilege IAM permissions on their SNS topics.
Quick answer
apache camel should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- Review vendor advisory for affected versions.
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
Apache Camel is affected by CVE-2026-56140, a header injection and route-control risk. Improper Input Validation vulnerability in Apache Camel AWS SNS component. The recommended remediation is to update to Apache Camel 4.14.8, 4.18.3, 4.21.0, or a later fixed release for the deployed AWS2 SNS component branch. Until the update is complete, filter inbound Camel headers from AWS SNS messages and block Camel-internal control headers until patched, review logs, and reduce exposure of the affected package, route, provider, or service workflow.
- Inventory every deployment, package, dependency, build runner, integration, route, service, and managed environment that uses Apache Camel.
- Confirm the installed version/build and compare it with version range 4.21.0 and the source advisory for CVE-2026-56140.
- Apply the vendor-supported fix: update to Apache Camel 4.14.8, 4.18.3, 4.21.0, or a later fixed release for the deployed AWS2 SNS component branch.
- If the update cannot be applied immediately, filter inbound Camel headers from AWS SNS messages and block Camel-internal control headers until patched; disable unnecessary public access, package-install paths, file processing, webhooks, message consumers, or high-risk integrations until patched.
- Review application, CI/CD, package manager, container, reverse-proxy, WAF, authentication, route, and audit logs for activity related to CVE-2026-56140.
- Rotate sessions, API tokens, package registry credentials, cloud credentials, webhook secrets, service credentials, and administrator passwords if logs or affected data indicate compromise, credential exposure, or unauthorized access.
- Clear caches, restart affected services, rebuild affected containers or build agents when appropriate, and remove temporary files, malicious artifacts, stored payloads, or unsafe configuration created during exploitation attempts.
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Verify the fix
- Confirm Apache Camel now reports Apache Camel 4.14.8, 4.18.3, 4.21.0, or a later fixed release for the deployed AWS2 SNS component branch or a later vendor-supported fixed release/build for the deployed branch.
- Verify the affected workflow no longer allows the behavior described in CVE-2026-56140, using a safe regression test, dependency inventory, or vendor validation method.
- Review logs after remediation for continued exploit attempts, denial-of-service symptoms, suspicious redirects, unauthorized requests, path traversal, header manipulation, credential exposure, or configuration changes.
- Rerun a Fixnx scan and any product-specific scanner, package audit, dependency check, route regression test, or integration test relevant to the affected service.
- Document affected assets, fixed versions, mitigation decisions, validation evidence, and any cleanup, rebuild, or credential rotation performed.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-56140?
apache camel should be checked against the vendor advisory and trusted references linked on this page.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.