CVE-2026-40858Network attack vector

Authenticated code execution via unfiltered cache deserialization

Published Apr 27, 2026 · Updated Apr 27, 2026

Unsafe deserialization in Apache Camel allows remote authenticated users to execute arbitrary code through crafted Infinispan cache entries. The ProtoStream remote aggregation repository passes cached bytes to ObjectInputStream.readObject without an ObjectInputFilter. Exploitation requires write access to the application’s Infinispan cache; a later get or recover operation runs the injected object in the application process.

CVSS severity8.8
High
EPSS probability0.93%
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 authenticated users to execute arbitrary code through crafted Infinispan cache entries. The ProtoStream remote aggregation repository passes cached bytes to ObjectInputStream.readObject without an ObjectInputFilter. Exploitation requires write access to the application’s Infinispan cache; a later get or recover operation runs the injected object in the application process.

The record

CVE
CVE-2026-40858
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
The Apache Software Foundation
Product
Apache Camel
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 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 <4.14.7
  2. Affected versionversion=4.15.0 <4.18.2
  3. Affected versionversion=4.19.0 <4.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Camelversion=4.0.0 <4.14.7; version=4.15.0 <4.18.2; version=4.19.0 <4.20.0

Published CVSS scores

8.8redhat-SADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploitation of Public-Facing Application

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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