CVE-2026-78162: Apache Camel · Deserialization of Untrusted Data
Affects Apache CamelSource CVE Database V5
Not known to be exploited · CVSS 10.0 Critical : upgrade to 4.22.1 or 4.18.5 as a priority.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.9% chance of exploitation in 30 days – higher than 60% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.22.1, 4.18.5
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HExploitation evidence
Disclosed: evidence found.
CVE published 19 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 29 Oct 2026.
What to do
Upgrade Apache to 4.22.1 or 4.18.5.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Camelorg.apache.camel:camel-hazelcast | Affected
| Fixed in
|
| Apache Camelorg.apache.camel:camel-hazelcast | Affected
| Fixed in
|
MavenApache Software Foundation/org.apache.camel:camel-hazelcastpkg:maven/Apache Software Foundation/org.apache.camel:camel-hazelcastOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in Apache Camel versions 4.18.5 and 4.22.1; users should upgrade to these or later versions such as 4.23.0. For users unable to upgrade immediately, mitigations include supplying an explicit Hazelcast configuration with a JavaSerializationFilterConfig, injecting a pre-built HazelcastInstance (which Camel does not overwrite), setting a JVM-wide serialization filter using -Djdk.serialFilter=!java.net.;java.;javax.;org.apache.camel.;!*, and enabling Hazelcast cluster authentication and TLS to restrict access. These mitigations reduce the risk of unsafe deserialization until an upgrade can be performed.
Description
CVE-2026-78162 is a critical deserialization of untrusted data vulnerability in Apache Camel affecting versions from 4.0.0 before 4.18.5 and from 4.19.0 before 4.22.1. The flaw arises because certain Hazelcast instances created internally by Camel do not apply Java deserialization filters, allowing an attacker with access to the Hazelcast cluster to cause arbitrary Java objects to be deserialized. This can lead to remote code execution. The issue is fixed in Apache Camel versions 4.18.5 and 4.22.1, and users are strongly advised to upgrade. Alternative mitigations include supplying explicit Hazelcast configurations with deserialization filters, injecting pre-built Hazelcast instances, setting JVM-wide serialization filters, and enabling Hazelcast cluster authentication and TLS.
References
- camel.apache.org/security/CVE-2026-78162.html (opens in a new tab)
- issues.apache.org/jira/browse/CAMEL-24413 (opens in a new tab)
- issues.apache.org/jira/browse/CAMEL-24420 (opens in a new tab)
- github.com/apache/camel/pull/25566 (opens in a new tab)
- github.com/apache/camel/pull/25595 (opens in a new tab)
- github.com/apache/camel/pull/25599 (opens in a new tab)
- github.com/apache/camel/pull/25600 (opens in a new tab)
- camel.apache.org/security/CVE-2026-43865.html (opens in a new tab)