CVE-2026-24656 is a low-severity (CVSS 3.7) Deserialization of Untrusted Data vulnerability in org.apache.karaf.decanter.collector:org.apache.karaf.decanter.collector.log.socket. A fix is available for org.apache.karaf.decanter.collector:org.apache.karaf.decanter.collector.log.socket — see the affected versions and patch details below.
Apache Karaf: Decanter log-socket collector has deserialization vulnerability
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
org.apache.karaf.decanter.collector:org.apache.karaf.decanter.collector.log.socketReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Deserialization of Untrusted Data vulnerability in Apache Karaf Decanter.
The Decanter log socket collector exposes the port 4560, without authentication. If the collector exposes allowed classes property, this configuration can be bypassed. It means that the log socket collector is vulnerable to deserialization of untrusted data, eventually causing DoS.
NB: Decanter log socket collector is not installed by default. Users who have not installed Decanter log socket are not impacted by this issue.
This issue affects Apache Karaf Decanter before 2.12.0.
Users are recommended to upgrade to version 2.12.0, which fixes the issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.apache.karaf.decanter.collector:org.apache.karaf.decanter.collector.log.socket | all versions | 2.12.0org.apache.karaf.decanter.collector:org.apache.karaf.decanter.collector.log.socket:2.12.0 |
Affected Products
karaf decanterapacheDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.karaf.decanter.collector:org.apache.karaf.decanter.collector.log.socket, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.karaf.decanter.collector:org.apache.karaf.decanter.collector.log.socket to 2.12.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-24656 is resolved across your whole dependency graph.
Workarounds
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.
Frequently Asked Questions
Is CVE-2026-24656 in your dependencies?
Find it across Maven, including transitive dependencies.