CVE-2026-66713

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 29, 2026

Advisory Details (2)

Auto-updated Jul 29, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-66713: Apache Axis2/Java: deserialization of untrusted Data

http://www.openwall.com/lists/oss-security/2026/07/28/2
generic
https://lists.apache.org/thread/fgggbv3sjjqw7p6q0j88gspt9b2rb728

Vendor Advisories for CVE-2026-66713(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-30 05:10 UTCEG score recompute
  2. 2026-07-30 05:09 UTCGHSA enrichment
  3. 2026-07-30 01:30 UTCEPSS rescore
  4. 2026-07-30 01:14 UTCGHSA enrichment
  5. 2026-07-29 21:18 UTCGHSA enrichment
  6. 2026-07-29 17:21 UTCGHSA enrichment
  7. 2026-07-29 13:25 UTCGHSA enrichment
  8. 2026-07-29 09:29 UTCGHSA enrichment
  9. 2026-07-29 05:33 UTCGHSA enrichment
  10. 2026-07-29 04:30 UTCGHSA enrichment
  11. 2026-07-29 00:34 UTCGHSA enrichment
  12. 2026-07-28 20:37 UTCEG score recompute
  13. 2026-07-28 20:37 UTCGHSA enrichment
  14. 2026-07-28 16:40 UTCGHSA enrichment
  15. 2026-07-28 16:40 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  16. 2026-07-28 15:37 UTCNVD update
  17. 2026-07-28 15:30 UTCEG score recompute▲ 9.80
  18. 2026-07-28 15:29 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  19. 2026-07-28 14:38 UTCEG score recompute
  20. 2026-07-28 14:38 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66713?
CVE-2026-66713 is a critical vulnerability published on July 28, 2026. 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…
When was CVE-2026-66713 disclosed?
CVE-2026-66713 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66713 actively exploited?
CVE-2026-66713 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 35.1% of all scored CVEs.
What is the CVSS score of CVE-2026-66713?
CVE-2026-66713 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-66713?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66713, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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