CVE-2026-47683

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: Elevated riskExposed: 0

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

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, the bufferAllocLimit enforcement in lib/setup-sandbox.js does not cover Buffer.concat(list, totalLength) or Buffer.from(arrayLike) with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory allocations that bypass the configured cap and can exhaust the host process. This issue is fixed in version 3.11.6.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
70(Attend)
EG Risk 70/100SSVC: Attend

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
Severity87% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 17, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v3.11.6

Patch available: patriksimek/vm2 3.11.6

https://github.com/patriksimek/vm2/releases/tag/3.11.6
github_commit Patch Available

commit 3ffb315512e6 (patriksimek/vm2)

Patch available: patriksimek/vm2 3.11.6 (contains commit 3ffb315512e6)

https://github.com/patriksimek/vm2/commit/3ffb315512e634cf85c447375e85d6c83d00a4bd
github Patch Available🟡 PoC Available

bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike · Advisory · patriksimek/vm2 · GitHub

https://github.com/patriksimek/vm2/security/advisories/GHSA-gmc2-2x9w-cgh9

Vendor Advisories for CVE-2026-47683(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
vm2—3.11.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 50× 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. 2026-09-19 04:03 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 02:09 UTCEG score recompute
  4. 2026-09-16 23:42 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 10:46 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 08:47 UTCEG score recompute
  9. 2026-09-13 17:22 UTCEG score recompute
  10. 2026-09-13 16:47 UTCEPSS rescore
  11. 2026-09-12 15:32 UTCEG score recompute
  12. 2026-09-12 02:37 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 13:38 UTCEG score recompute
  15. 2026-09-10 10:23 UTCEG score recompute
  16. 2026-09-10 09:34 UTCEPSS rescore
  17. 2026-09-09 03:39 UTCEG score recompute
  18. 2026-09-08 22:00 UTCEPSS rescore
  19. 2026-09-07 16:11 UTCEG score recompute
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-07 01:38 UTCEG score recompute
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-05 23:45 UTCEG score recompute
  24. 2026-09-04 21:54 UTCEG score recompute
  25. 2026-09-04 08:04 UTCEG score recompute
Show 34 more
  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 17:08 UTCEG score recompute
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-02 01:47 UTCEG score recompute
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-09-01 12:10 UTCEG score recompute
  7. 2026-08-30 21:19 UTCEG score recompute
  8. 2026-08-30 19:17 UTCEPSS rescore
  9. 2026-08-30 08:23 UTCEG score recompute
  10. 2026-08-30 01:22 UTCEPSS rescore
  11. 2026-08-29 05:31 UTCEG score recompute
  12. 2026-08-28 21:41 UTCEPSS rescore
  13. 2026-08-27 20:49 UTCEG score recompute
  14. 2026-08-27 14:25 UTCEPSS rescore
  15. 2026-08-26 18:59 UTCEG score recompute
  16. 2026-08-26 14:46 UTCEPSS rescore
  17. 2026-08-25 17:06 UTCEG score recompute
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-24 14:58 UTCEG score recompute
  20. 2026-08-23 13:06 UTCEG score recompute
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 11:12 UTCEG score recompute
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-21 09:22 UTCEG score recompute
  25. 2026-08-20 22:55 UTCEPSS rescore
  26. 2026-08-19 18:36 UTCEG score recompute
  27. 2026-08-19 17:04 UTCEPSS rescore
  28. 2026-08-18 16:46 UTCEG score recompute
  29. 2026-08-18 15:45 UTCEG score recompute
  30. 2026-08-18 13:48 UTCEPSS rescore
  31. 2026-08-17 21:32 UTCEG score recompute
  32. 2026-08-17 21:05 UTCEG score recompute▲ 8.70
  33. 2026-08-17 21:04 UTCMITRE cvelistV5CVSS v3 → 8.7 · CVSS v4 → 8.7
  34. 2026-08-17 17:54 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-47683?
CVE-2026-47683 is a high vulnerability published on August 17, 2026. vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, the bufferAllocLimit enforcement in lib/setup-sandbox.js does not cover Buffer.concat(list, totalLength) or Buffer.from(arrayLike) with an attacker-controlled length, allowing sandbox code to perform large synchronous host…
When was CVE-2026-47683 disclosed?
CVE-2026-47683 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47683 actively exploited?
CVE-2026-47683 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 66.7% of all scored CVEs.
What is the CVSS score of CVE-2026-47683?
CVE-2026-47683 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-47683?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47683, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-47683

Explore →

Is Your Infrastructure Affected by CVE-2026-47683?

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

Start Free Scan →Browse All CVEs