CVE-2026-107726

CRITICALPre-NVD 9.39.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-95314 (ENISA EUVD) · GHSA-6v25-8wq6-xq4j (GitHub Security Advisories)Source: ENISA EUVD

9.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Hazelcast is a unified real-time data platform combining stream processing with a fast data store. Prior to 5.4.5, 5.5.10, and 5.6.1, improper validation of data supplied by a malicious client able to connect to a cluster allows arbitrary reads from a cluster member's Java heap, off-heap data, and JVM process address space. The same flaw can crash cluster members and, in some Hazelcast Enterprise Edition configurations, corrupt memory with possible arbitrary code execution. Both slim and full distributions are affected. This issue is fixed in versions 5.4.5, 5.5.10, 5.6.1, and 5.7.0.

CVSS v3
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
57
EG Risk 57/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity93% × 45%
Impact severity (EG Severity): CVSS 9.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.

EG Severity
9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 8, 2026

Last Modified

October 9, 2026

Advisory Details (5)

Auto-updated Oct 8, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

v5.7.0

Patch available: hazelcast/hazelcast v5.7.0

https://github.com/hazelcast/hazelcast/releases/tag/v5.7.0
Web page

Enterprise Edition Release Notes | Hazelcast Documentation

https://docs.hazelcast.com/hazelcast/5.7/release-notes/enterprise
Web page

Community Edition Release Notes | Hazelcast Documentation

https://docs.hazelcast.com/hazelcast/5.7/release-notes/community
GitHub commit

commit 361979da12f1 (hazelcast/hazelcast)

Fix landed in hazelcast/hazelcast commit 361979da12f1 — awaiting tagged release

https://github.com/hazelcast/hazelcast/commit/361979da12f18950c24719db832ca6c5e7c0534f
GitHub advisoryMentions a patch (unverified)

Arbitrary member memory access by low-privileged client · Advisory · hazelcast/hazelcast · GitHub

https://github.com/hazelcast/hazelcast/security/advisories/GHSA-6v25-8wq6-xq4j

Vendor Advisories for CVE-2026-107726(1)

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 / EcosystemFix (by version range) / PatchReleasedSource
mavencom.hazelcast:hazelcast @ 5.7.0 (fixes < 5.4.5)—ghsa

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.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
com.hazelcast:hazelcast1.5 ... 5.6.0-BETA-1 (270 versions)
  • 5.6.0 up to 5.7.0: fixed in 5.7.0
  • 5.5.0 up to 5.7.0: fixed in 5.7.0
  • every version up to 5.7.0: fixed in 5.7.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 58× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 23:58 UTCEG score recompute
  2. 2026-11-01 23:58 UTCGHSA enrichmentGHSA-6v25-8wq6-xq4j · GitHub severity CRITICAL
  3. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-11-01 08:00 UTCGHSA enrichmentGHSA-6v25-8wq6-xq4j · GitHub severity CRITICAL
  5. 2026-11-01 02:13 UTCEG score recompute
  6. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-10-31 04:29 UTCEG score recompute
  8. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-30 06:43 UTCEG score recompute
  10. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-29 08:58 UTCEG score recompute
  12. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-10-28 11:13 UTCEG score recompute
  14. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-27 06:01 UTCEG score recompute
  16. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-26 04:10 UTCEG score recompute
  18. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-10-25 14:54 UTCEG score recompute
  20. 2026-10-25 06:25 UTCEG score recompute
  21. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  22. 2026-10-24 08:40 UTCEG score recompute
  23. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  24. 2026-10-23 10:55 UTCEG score recompute
  25. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
Show 33 more
  1. 2026-10-22 12:54 UTCEG score recompute
  2. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-20 17:17 UTCEG score recompute
  4. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  5. 2026-10-20 02:52 UTCEG score recompute
  6. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  7. 2026-10-19 02:52 UTCEG score recompute
  8. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  9. 2026-10-18 05:05 UTCEG score recompute
  10. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  11. 2026-10-17 06:42 UTCEG score recompute
  12. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-10-16 08:04 UTCEG score recompute
  14. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  15. 2026-10-15 07:06 UTCEG score recompute
  16. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  17. 2026-10-14 02:58 UTCEG score recompute
  18. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  19. 2026-10-12 16:38 UTCEG score recompute
  20. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  21. 2026-10-11 19:37 UTCEG score recompute
  22. 2026-10-11 18:26 UTCEG score recompute
  23. 2026-10-11 15:00 UTCEG score recompute
  24. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  25. 2026-10-10 22:34 UTCEG score recompute
  26. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  27. 2026-10-09 21:14 UTCEG score recompute
  28. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-10-09 16:34 UTCEG score recompute
  30. 2026-10-09 15:26 UTCEG score recompute
  31. 2026-10-08 22:21 UTCEG score recompute
  32. 2026-10-08 22:13 UTCEG score recomputeFirst assessed: 9.3 CRITICAL
  33. 2026-10-08 22:13 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-107726?
CVE-2026-107726 is a critical-severity vulnerability; its CVE record was published on October 8, 2026. Hazelcast is a unified real-time data platform combining stream processing with a fast data store. Prior to 5.4.5, 5.5.10, and 5.6.1, improper validation of data supplied by a malicious client able to connect to a cluster allows arbitrary reads from a cluster member's Java heap, off-heap data, and…
When was the CVE record for CVE-2026-107726 published?
The CVE record for CVE-2026-107726 was published on October 8, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 9, 2026; the record at its source may have been updated since.
Is CVE-2026-107726 actively exploited?
CVE-2026-107726 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107726?
CVE-2026-107726 has a CVSS base score of 9.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107726?
A fix for CVE-2026-107726 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107726 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-107726

Explore →

Is Your Infrastructure Affected by CVE-2026-107726?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.