CVE-2026-66713 Apache Axis2/Java: deserialization of untrusted Data
Unauthenticated remote attackers can execute arbitrary code via crafted serialized objects in the Tribes clustering component, which is disabled by default.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66713?
CVE-2026-66713 is a critical unsafe deserialization vulnerability in Apache Axis2/Java, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Deserialization of Untrusted Data (CWE-502) in the Tribes-based clustering component
in Apache Software Foundation Apache Axis2/Java through 2.0.0 on Apache Tomcat
(only when Tribes clustering is enabled, which is off by default) allows an
unauthenticated remote attacker with network access to the clustering port to
execute arbitrary code via a crafted serialized Java object delivered to the cluster
channel and deserialized in
org.apache.axis2.clustering.tribes.Axis2ChannelListener#messageReceived. Users are
recommended to upgrade to version 2.0.1, which fixes this issue by removing the
clustering feature entirely.
Weakness: CWE-502
Which versions are affected by CVE-2026-66713?
It affects 1 product.
Products include Apache Axis2\/Java.
How do I fix CVE-2026-66713?
No fix has been published for CVE-2026-66713 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-66713 being exploited?
There is no known exploitation of CVE-2026-66713 in the wild and no public exploit code.
Sources
Also known as GHSA-fhh8-qfj4-g948.