CVE-2026-43866Network attack vector

Exchange-state injection via allow-listed DefaultExchangeHolder

Published Jul 6, 2026 · Updated Jul 6, 2026

Deserialization filter bypass in Apache Camel allows remote attackers to inject Exchange state through a crafted JMS ObjectMessage. JmsBinding.extractBodyFromJms() accepts an allow-listed DefaultExchangeHolder and invokes unmarshal(), copying attacker-controlled fields into the routed Exchange. Exploitation requires publishing an ObjectMessage to a consumed JMS destination and can alter message bodies, headers, properties, variables, identifiers, exceptions, routing, and error handling.

CVSS severity7.3
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization filter bypass in Apache Camel allows remote attackers to inject Exchange state through a crafted JMS ObjectMessage. JmsBinding.extractBodyFromJms() accepts an allow-listed DefaultExchangeHolder and invokes unmarshal(), copying attacker-controlled fields into the routed Exchange. Exploitation requires publishing an ObjectMessage to a consumed JMS destination and can alter message bodies, headers, properties, variables, identifiers, exceptions, routing, and error handling.

The record

CVE
CVE-2026-43866
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
The Apache Software Foundation
Product
Apache Camel
Classifications
CWE-502, CWE-20, T1565
Attack vector
network
Privileges
Unavailable

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=3.0.0 <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 privilegesUnavailable in this record.

What is affected?

The Apache Software Foundation · Apache Camelversion=3.0.0 <4.14.8; version=4.15.0 <4.18.3; version=4.19.0 <4.21.0

Published CVSS scores

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-20Improper Input Validation
T1565Data Manipulation

Public exploit references

No public exploit references are available in this record.

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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