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Fencer Vulns
critical 9.8

CVE-2026-66713 json

Apache Axis2/Java: deserialization of untrusted Data

published 2026-07-28 3 mo ago modified 2026-10-24 16 d ago also EUVD-2026-49849

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

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.

Patch / fix

  • apache axis2/java 2.0.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-66713 updated cvss 8.1

org.apache.axis2/axis2-java-core: tomcat: Apache Axis2/Java: Remote code execution via deserialization of untrusted data in Tribes clustering

  • Red Hat Enterprise Linux 6 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat6-el-2.1-api, +4 more Red Hat Enterprise Linux 7 tomcat, tomcat-lib, tomcat-jsvc, tomcat-javadoc, tomcat-webapps, tomcat-el-2.2-api, +4 more Red Hat Enterprise Linux 8 tomcat, tomcat-lib, tomcat-webapps, tomcat-el-3.0-api, tomcat-docs-webapp, tomcat-jsp-2.3-api, +2 more Red Hat Enterprise Linux 9 tomcat, tomcat-lib, tomcat-webapps, tomcat-el-3.0-api, tomcat-docs-webapp, tomcat-jsp-2.3-api, +2 more Red Hat Enterprise Linux 10 tomcat, tomcat9
    not affected: vulnerable code not present
  • Red Hat Hardened Images tomcat10 10.1.57-3.1.hum1, tomcat11 11.0.24-0.2.hum1
    not affected: component not present
  • Red Hat JBoss Enterprise Application Platform Expansion Pack axis2-kernel 1.6.0 Red Hat JBoss Web Server 5 jws5-tomcat, jws5-tomcat-lib, jws5-tomcat-jsvc, jws5-tomcat-javadoc, jws5-tomcat-selinux, jws5-tomcat-webapps, +7 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

1.72% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Apache Software Foundation Apache Axis2/Java

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.