CVE-2026-92944

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-17. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
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: Elevated riskExposed: 0

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

vm2 versions 3.10.2 through 3.11.6 contain a sandbox escape vulnerability on Node.js 26 where Promise.prototype.finally() bypasses vm2's wrapper protections due to a stale PromiseThenLookupChain protector in V8 14.6. Attackers can exploit this by creating an async function that returns a Promise with an attacker-controlled constructor Symbol.species, allowing them to reach the host Function constructor and process object for arbitrary code execution.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 19, 2026

Advisory Details (2)

Auto-updated Sep 19, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Private security report: vm2 sandbox escape on Node.js 26 through a stale PromiseThenLookupChain protector · Advisory · patriksimek/vm2 · GitHub

Affected: 3.11.4. The current entry point is the intrinsic async Promise plus

https://github.com/patriksimek/vm2/security/advisories/GHSA-27g9-p43v-cw3v
generic

vm2 3.10.2 through 3.11.6 Sandbox Escape via Promise Protector | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vm2-3.10.2-through-3.11.6-sandbox-escape-via-promise-protector

Vendor Advisories for CVE-2026-92944(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 22× in last 7d / 22× 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 19:38 UTCEG score recompute
  2. 2026-09-19 19:38 UTCGHSA enrichment
  3. 2026-09-19 15:36 UTCGHSA enrichment
  4. 2026-09-19 11:32 UTCGHSA enrichment
  5. 2026-09-19 07:30 UTCGHSA enrichment
  6. 2026-09-19 03:29 UTCEG score recompute
  7. 2026-09-19 03:29 UTCGHSA enrichment
  8. 2026-09-19 02:35 UTCGHSA enrichment
  9. 2026-09-18 22:34 UTCEG score recompute
  10. 2026-09-18 22:34 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 18:33 UTCGHSA enrichment
  13. 2026-09-18 14:29 UTCGHSA enrichment
  14. 2026-09-18 10:28 UTCGHSA enrichment
  15. 2026-09-18 06:27 UTCGHSA enrichment
  16. 2026-09-18 02:26 UTCGHSA enrichment
  17. 2026-09-17 22:25 UTCGHSA enrichment
  18. 2026-09-17 18:24 UTCEG score recompute
  19. 2026-09-17 18:23 UTCGHSA enrichment
  20. 2026-09-17 14:22 UTCEG score recompute
  21. 2026-09-17 13:50 UTCEG score recompute
  22. 2026-09-17 13:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-92944?
CVE-2026-92944 is a critical vulnerability published on September 17, 2026. vm2 versions 3.10.2 through 3.11.6 contain a sandbox escape vulnerability on Node.js 26 where Promise.prototype.finally() bypasses vm2's wrapper protections due to a stale PromiseThenLookupChain protector in V8 14.6. Attackers can exploit this by creating an async function that returns a Promise…
When was CVE-2026-92944 disclosed?
CVE-2026-92944 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92944 actively exploited?
CVE-2026-92944 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 53.6% of all scored CVEs.
What is the CVSS score of CVE-2026-92944?
CVE-2026-92944 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-92944?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92944, 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

Explore the affected products and dependency analysis for CVE-2026-92944

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