CVE-2026-49364

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-10. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — Patch released this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

An unauthenticated network-adjacent attacker can leverage discovery to capture cluster administrative credentials during the initial cluster connection handshake.

This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apache ActiveMQ Artemis: from 1.0.0 through 2.44.0.

Users are recommended to upgrade to version 2.57.0, which fixes the issue.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread/4qbgcz3k38q30bfbf7hphtomrdc8l8n8

Vendor Advisories for CVE-2026-49364(3)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatartemis-server2026-09-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 24× 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. 2026-09-11 18:10 UTCEG score recompute
  2. 2026-09-11 18:10 UTCVendor advisory
  3. 2026-09-11 18:10 UTCGHSA enrichment
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 13:52 UTCEG score recompute
  6. 2026-09-11 13:52 UTCVendor advisory
  7. 2026-09-11 13:52 UTCGHSA enrichment
  8. 2026-09-11 09:34 UTCVendor advisory
  9. 2026-09-11 09:34 UTCGHSA enrichment
  10. 2026-09-11 05:16 UTCVendor advisory
  11. 2026-09-11 05:16 UTCGHSA enrichment
  12. 2026-09-11 00:58 UTCVendor advisory
  13. 2026-09-11 00:58 UTCGHSA enrichment
  14. 2026-09-10 20:40 UTCEG score recompute
  15. 2026-09-10 20:40 UTCGHSA enrichment
  16. 2026-09-10 16:22 UTCGHSA enrichment
  17. 2026-09-10 16:00 UTCEG score recompute▲ 9.10
  18. 2026-09-10 16:00 UTCGHSA enrichment
  19. 2026-09-10 16:00 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  20. 2026-09-10 14:58 UTCGHSA enrichment
  21. 2026-09-10 06:35 UTCGHSA enrichment
  22. 2026-09-10 05:34 UTCNVD update
  23. 2026-09-10 04:55 UTCEG score recompute
  24. 2026-09-10 04:54 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-49364?
CVE-2026-49364 is a critical vulnerability published on September 10, 2026. An unauthenticated network-adjacent attacker can leverage discovery to capture cluster administrative credentials during the initial cluster connection handshake. This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apache ActiveMQ Artemis: from 1.0.0 through 2.44.0. Users are recommended…
When was CVE-2026-49364 disclosed?
CVE-2026-49364 was first published in the National Vulnerability Database on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49364 actively exploited?
CVE-2026-49364 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 78.4% of all scored CVEs.
What is the CVSS score of CVE-2026-49364?
CVE-2026-49364 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-49364?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49364, 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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