CVE-2026-40858 Apache Camel: Camel-Infinispan: Unsafe Deserialization in Remote Aggregation Repository
An attacker with write access to the Infinispan cache can achieve arbitrary code execution in Apache Camel applications via unsafe deserialization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40858?
CVE-2026-40858 is a high-severity unsafe deserialization vulnerability in Apache Camel, published on 27 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-502
Which versions are affected by CVE-2026-40858?
6 open source packages ship an affected version, including org.apache.camel:camel-infinispan. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.camel:camel-infinispan Maven | From 4.0.0 | 4.14.7 |
org.apache.camel:camel-infinispan Maven | From 4.0.0 | 4.14.7 |
org.apache.camel:camel-infinispan Maven | From 4.15.0 | 4.18.2 |
org.apache.camel:camel-infinispan Maven | From 4.15.0 | 4.18.2 |
org.apache.camel:camel-infinispan Maven | From 4.19.0 | 4.20.0 |
org.apache.camel:camel-infinispan Maven | From 4.19.0 | 4.20.0 |
Products include Apache Camel.
How do I fix CVE-2026-40858?
Upgrade org.apache.camel:camel-infinispan to a fixed version for your release line: 4.14.7, 4.18.2 or 4.20.0.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-40858 being exploited?
There is no known exploitation of CVE-2026-40858 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Apache Camel
- CVE-2026-33453 Apache camel-coap allows header injection that can lead to remote code execution
- CVE-2026-40453 Apache Camel has an incomplete fix for CVE-2025-27636
- CVE-2026-80351 Apache Camel K: Camel K Tenant repositories reach Maven execution inside operator pod
- CVE-2026-80352 Apache Camel K: Camel K Master trait serviceAccountName YAML injection lets CR author apply arbitrary objects
- CVE-2026-71300 Apache Camel: Camel-Atmosphere-Websocket: WebSocket dispatch header injection
Sources
Also known as GHSA-4xwx-hvv7-7prj.