CVE-2026-43865Public exploitNetwork attack vector

Remote code execution via unfiltered Hazelcast deserialization

Published Jul 6, 2026 · Updated Jul 6, 2026

Unsafe deserialization in Apache Camel allows remote attackers to execute code through crafted objects sent over the Hazelcast cluster protocol. When Camel creates a managed Hazelcast Config without a supplied instance, URI, or Config bean, it installs no JavaSerializationFilterConfig or ObjectInputFilter before Hazelcast calls ObjectInputStream.readObject. Network access sufficient to join or publish to the cluster reaches nodes using a Hazelcast consumer or affected repository, while code execution also requires a usable gadget on the application classpath.

CVSS severity8.1
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Apache Camel allows remote attackers to execute code through crafted objects sent over the Hazelcast cluster protocol. When Camel creates a managed Hazelcast Config without a supplied instance, URI, or Config bean, it installs no JavaSerializationFilterConfig or ObjectInputFilter before Hazelcast calls ObjectInputStream.readObject. Network access sufficient to join or publish to the cluster reaches nodes using a Hazelcast consumer or affected repository, while code execution also requires a usable gadget on the application classpath.

The record

CVE
CVE-2026-43865
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
The Apache Software Foundation
Product
Apache Camel
Classifications
CWE-502, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0 <4.14.8
  2. Affected versionversion=4.15.0 <4.18.3
  3. Affected versionversion=4.19.0 <4.21.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Camelversion=4.0.0 <4.14.8; version=4.15.0 <4.18.3; version=4.19.0 <4.21.0

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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