CVE-2026-46587 Overview
CVE-2026-46587 is an improper input validation vulnerability [CWE-20] affecting Apache Camel, the widely deployed open-source integration framework. The flaw exists in multiple release branches and can be triggered remotely without authentication or user interaction. Apache assigned the issue a CVSS 3.1 base score of 7.3, reflecting network-based exploitability with low complexity and impact across confidentiality, integrity, and availability. The Apache Camel project has published a security advisory and released fixed versions.
Critical Impact
Remote, unauthenticated attackers can send crafted input to Apache Camel routes, potentially affecting message processing integrity, exposing data, or disrupting service across integrations that rely on affected releases.
Affected Products
- Apache Camel versions through 4.14.7
- Apache Camel versions from 4.15.0 through 4.18.2
- Apache Camel versions from 4.19.0 through 4.20.0
Discovery Timeline
- 2026-07-06 - CVE-2026-46587 published to the National Vulnerability Database (NVD)
- 2026-07-08 - Last updated in NVD database
Technical Details for CVE-2026-46587
Vulnerability Analysis
Apache Camel is a Java-based integration framework that routes and transforms messages between systems using Enterprise Integration Patterns. CVE-2026-46587 stems from improper input validation within affected Camel components. The issue is exploitable over the network without prior authentication or user interaction, and it affects three release ranges spanning the 4.14.x, 4.15.x through 4.18.x, and 4.19.x through 4.20.0 branches.
The Exploit Prediction Scoring System (EPSS) currently rates the probability of exploitation at approximately 0.4%. No public proof-of-concept, exploit code, or in-the-wild activity has been reported, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Root Cause
The root cause is classified under [CWE-20] Improper Input Validation. Apache Camel does not sufficiently validate specific input handled during message processing, allowing crafted content to reach code paths that assume well-formed data. Full technical details are provided in the Apache Camel CVE-2026-46587 Advisory.
Attack Vector
The attack vector is network-based. An unauthenticated remote attacker can submit malicious input to an application that exposes affected Apache Camel routes or endpoints. Successful exploitation may lead to limited disclosure of information, tampering with processed messages, or availability impact on integration workflows. See the Openwall OSS Security Discussion for additional community analysis.
No verified public exploit code is currently available. Refer to the vendor advisory for authoritative technical details rather than synthetic reproductions.
Detection Methods for CVE-2026-46587
Indicators of Compromise
- Unexpected exceptions or validation errors originating from Apache Camel routes in application logs.
- Anomalous inbound requests to Camel HTTP, JMS, or messaging endpoints with malformed or unusually structured payloads.
- Repeated failed message processing events correlated with a single source address or client identifier.
Detection Strategies
- Inventory all Java applications and container images that ship Apache Camel and identify versions in the affected ranges using software composition analysis.
- Enable verbose logging on Camel error handlers and dead letter channels to capture malformed payloads for analysis.
- Correlate application logs with network telemetry to identify sources sending traffic that repeatedly triggers Camel validation errors.
Monitoring Recommendations
- Monitor Camel JMX metrics for spikes in failed exchanges, error routes, or exchange processing time.
- Alert on Camel version banners or dependency manifests reporting vulnerable versions in build pipelines.
- Track outbound connections from Camel processes for deviations from expected integration destinations.
How to Mitigate CVE-2026-46587
Immediate Actions Required
- Upgrade Apache Camel to a fixed release: 4.14.8, 4.18.3, or 4.21.0.
- Audit all applications, microservices, and container images embedding Apache Camel to confirm remediation coverage.
- Restrict network exposure of Camel endpoints to trusted sources until patches are deployed.
Patch Information
The Apache Camel project has released patched versions 4.14.8, 4.18.3, and 4.21.0 that address CVE-2026-46587. Users on the 4.14.x branch should move to 4.14.8, users on 4.15.x through 4.18.x should upgrade to 4.18.3, and users on 4.19.x or 4.20.0 should upgrade to 4.21.0. Full remediation guidance is available in the Apache Camel CVE-2026-46587 Advisory.
Workarounds
- Place a Web Application Firewall or API gateway in front of Camel endpoints to validate and filter inbound payloads.
- Enforce strict schema validation and content-type checks upstream of Camel routes.
- Apply network segmentation to limit which clients can reach Camel-hosted services until upgrades are completed.
# Maven dependency update example
# Update pom.xml to a fixed Apache Camel version
mvn versions:set-property -Dproperty=camel.version -DnewVersion=4.21.0
mvn clean verify
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
