CVE-2026-66713: Deserialization of Untrusted Data (CWE-502) in the Tribes-based clustering component in Apache Software Fou

Q: How do I fix CVE-2026-66713?

axis2\/java: upgrade to 2.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-66713 being exploited?

CVE-2026-66713 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-66713 affect?

CVE-2026-66713 affects axis2\/java. Severity is critical (CVSS 9.8). 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) allo

Q: How urgent is CVE-2026-66713?

Priority 67/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2026-66713 is a critical-severity flaw (CVSS 9.8) affecting axis2\/java. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 o

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-07-28
Last modified	2026-10-24

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-28 15:17 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

apache axis2\/java UPGRADE

Affected: < 2.0.1

Fixed in: 2.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy axis2java || rpm -q axis2java || axis2java --version

2. UPGRADE to 2.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade axis2java

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade axis2java

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

RHEL 10 · tomcat · NOT AFFECTED

RHEL 10 · tomcat9 · NOT AFFECTED

RHEL 6 · tomcat6 · NOT AFFECTED

RHEL 7 · tomcat · NOT AFFECTED

RHEL 8 · tomcat · NOT AFFECTED

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-66713?

axis2\/java: upgrade to 2.0.1. Exact commands for each OS are on this page.

Is CVE-2026-66713 being exploited?

CVE-2026-66713 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-66713 affect?

CVE-2026-66713 affects axis2\/java. Severity is critical (CVSS 9.8). 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) allo

How urgent is CVE-2026-66713?

Priority 67/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache Tomcat vulnerabilities · Java vulnerabilities

References

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