Is CVE-2026-40858 actively exploited?

No active exploitation of CVE-2026-40858 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40858 be exploited remotely?

Yes. CVE-2026-40858 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40858?

CVE-2026-40858 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2026-40858

CWE-502Published: April 27, 2026· Updated: Apr 28, 2026

8.8

CVSS v3.1

EPSS:0.15%probability of exploitation in 30 daysPercentile:35.4th

Official Description

The camel-infinispan component's ProtoStream-based remote aggregation repository deserializes data read from a remote Infinispan cache using java.io.ObjectInputStream without applying any ObjectInputFilter. An attacker who can write to the Infinispan cache used by a Camel application can inject a crafted serialized Java object that, when read during normal aggregation repository operations such as get or recover, results in arbitrary code execution in the context of the application.

This issue affects Apache Camel: from 4.0.0 before 4.14.7, from 4.15.0 before 4.18.2, from 4.19.0 before 4.20.0.

Users are recommended to upgrade to version 4.20.0, which fixes the issue. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.7. If users are on the 4.18.x releases stream, then they are suggested to upgrade to 4.18.2.

The JIRA ticket: https://issues.apache.org/jira/browse/CAMEL-23322 refers to the various commits that resolved the issue, and have more details. This issue follows the same class of vulnerability previously addressed in CVE-2024-22369, CVE-2024-23114 and CVE-2026-25747.

NVD Source

Technical Analysis

CVE-2026-40858 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.