Deserialization of Untrusted Data in Apache Camel - CVE-2026-43865
Published: August 24, 2026
Vulnerability identifier: #VU144710
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43865
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to deserialization of untrusted data in the camel-hazelcast component when processing serialized objects received over the Hazelcast cluster protocol. A remote attacker can publish a crafted serialized Java object to execute arbitrary code.
The issue is exposed by default when Camel creates and manages the Hazelcast instance from its own default configuration rather than using a user-supplied HazelcastInstance, hazelcastConfigUri, or referenced Config bean.
Affected software
Apache Camel
How to mitigate CVE-2026-43865
Install security update from vendor's website.
Apache Camel - addressed in versions 4.15.0, 4.19.0, 4.21.0