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VulnerabilityPublished Updated

CVE-2026-40858: Apache Camel · Deserialization of Untrusted Data

Affects Apache CamelSource CVE Database V5

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Mentioned vulnerabilities

Not known to be exploited · CVSS 8.8 High · fixed in 4.20.0 : patch Apache Camel soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.3% chance of exploitation in 30 days – higher than 70% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.20.0, 4.18.2, 4.14.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Apache to 4.20.0, 4.18.2 or 4.14.7.

Affected software

ProductAffectedFixed in
Apache Software FoundationApache CamelAffected
  • >=4.19.0 <4.20.0
Fixed in
  • 4.20.0
Apache Software FoundationApache CamelAffected
  • >=4.15.0 <4.18.2
Fixed in
  • 4.18.2
Apache Software FoundationApache CamelAffected
  • >=4.0.0 <4.14.7
Fixed in
  • 4.14.7
Mavenorg.apache.camel/camel-infinispanpkg:maven/org.apache.camel/camel-infinispanOther threatsAffected
  • 4.0.0 – 4.19.0
6 affected builds
Fixed in–
MavenApache Software Foundation/org.apache.camel:camel-infinispanpkg:maven/Apache Software Foundation/org.apache.camel:camel-infinispanOther threatsAffected
  • >=4.0.0 <4.14.7
  • >=4.15.0 <4.18.2
  • >=4.19.0 <4.20.0
Fixed in
  • 4.14.7
  • 4.18.2
  • 4.20.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrading to Apache Camel versions 4.14.7, 4.18.2, or 4.20.0, depending on the release stream in use, fully addresses this vulnerability. Red Hat users should apply the corresponding security updates provided in their advisories (e.g., Red Hat Build of Apache Camel 4.18 for Quarkus 3.33.1.GA). Before applying updates, back up existing installations and configurations. There is no indication that any temporary or alternative mitigations exist; patching is the recommended and effective remediation.

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.

References

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