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Vulnerability record · CVE-2026-66713 · published 28 July 2026

CVE-2026-66713: Apache axis2\/java deserialization of untrusted data vulnerability

Apache · Axis2\/Java

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.

9.8 CVSS 3.1 Critical EPSS 1.7% · top 23.5% CWE-502 · Deserialization of untrusted data
9.8CVSS 3.1 base score
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
5 Aug 2026Last modified by 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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/apache/axis-axis2-java-core/commit/e6f53b230bddcb40577c84ff290ba51e7265fa15 Patch
https://lists.apache.org/thread/fgggbv3sjjqw7p6q0j88gspt9b2rb728 Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/07/28/2 Mailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-66713), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.