PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-43866 Apache CVE debrief

CVE-2026-43866 is a Deserialization of Untrusted Data vulnerability in Apache Camel, Apache Camel JMS component. The vulnerability exists in the JmsBinding.extractBodyFromJms() method in camel-jms and camel-sjms, which deserializes the payload of an incoming JMS ObjectMessage via jakarta.jms.ObjectMessage.getObject() when the mapJmsMessage option is enabled. An attacker can inject arbitrary Exchange state using universally-trusted java.lang and java.util types, without requiring a deserialization gadget chain, to manipulate routing and headers, exchange properties, and error handling. This issue affects Apache Camel versions 3.0.0 to 4.14.7, 4.15.0 to 4.18.2, and 4.19.0 to 4.20.0.

Vendor
Apache
Product
Camel
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-06
Original CVE updated
2026-07-07
Advisory published
2026-07-06
Advisory updated
2026-07-07

Who should care

Users of Apache Camel versions 3.0.0 to 4.14.7, 4.15.0 to 4.18.2, and 4.19.0 to 4.20.0 should upgrade to version 4.21.0 or apply mitigations. This includes operators, platform administrators, vulnerability management teams, and security teams who need to assess and remediate this vulnerability in their environments.

Technical summary

The vulnerability exists in the JmsBinding.extractBodyFromJms() method in camel-jms and camel-sjms. An attacker can inject arbitrary Exchange state using universally-trusted java.lang and java.util types, without requiring a deserialization gadget chain, to manipulate routing and headers, exchange properties, and error handling. The issue affects Apache Camel versions 3.0.0 to 4.14.7, 4.15.0 to 4.18.2, and 4.19.0 to 4.20.0. Users should verify their deployments and apply mitigations as necessary.

Defensive priority

High

Recommended defensive actions

  • Upgrade to Apache Camel version 4.21.0
  • Disable JMS ObjectMessage handling by default in camel-jms, camel-sjms, and JMS-family components
  • Restrict publish access to queues and topics consumed by Camel to trusted producers via JMS broker authorization
  • Do not expose JMS consumers that map ObjectMessage bodies to untrusted networks
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-06T09:16:35.913Z and was last modified on 2026-07-07T23:35:44.433Z. The NVD entry is currently Analyzed. This vulnerability affects Apache Camel versions 3.0.0 to 4.14.7, 4.15.0 to 4.18.2, and 4.19.0 to 4.20.0. Users should verify their deployments and apply mitigations as necessary.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-06T09:16:35.913Z and has not been modified since then. The NVD entry is currently Analyzed.