SEPTEMBER 17, 2026
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Case File

CVE-2026-66713

CRITICAL · CVSS 9.8 EPSS 1.03% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-28 · Last synced 2026-08-27

CyberRota Analysis

AI-Generated

The vulnerability exists in Apache Axis2/Java when the Tribes clustering component is enabled, allowing unauthenticated remote attackers to execute arbitrary code through crafted serialized Java objects sent to the cluster channel. This critical flaw poses a significant risk to systems using this configuration, particularly those with network access to the clustering port. Organizations utilizing Apache Axis2 should prioritize upgrading to version 2.0.1 or later to mitigate this threat, as it removes the vulnerable clustering feature.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-66713
Severity
CRITICAL
CVSS
9.8
EPSS
1.03%
Apache Java

Original NVD 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.

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