CVE-2026-92957

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-17. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: Elevated riskExposed: 0

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

vm2 through 3.11.6 does not normalize node:-prefixed builtin specifiers when evaluating user-supplied negative (deny) entries in a NodeVM wildcard require policy. Although NodeVM strips the node: prefix during require() resolution, negative wildcard entries are matched by exact string comparison against the canonical builtin names, so a policy such as new NodeVM({ require: { builtin: ['*', '-node:child_process'] } }) fails to deny the canonical child_process module. Sandboxed code can therefore obtain the host child_process builtin via require('child_process') or require('node:child_process'), gaining references to process-spawning APIs such as execSync and spawn, which is equivalent to host command-execution capability for untrusted sandbox code. Fixed in vm2 3.11.7. (Suggested title: "vm2 before 3.11.7: NodeVM builtin deny-list bypass via node:-prefixed specifiers exposes child_process")

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
61(Track*)
EG Risk 61/100SSVC: 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
Severity99% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Sep 17, 2026
Patch available. Sources: github.
github Patch Available

NodeVM node:-prefixed negative builtin deny bypass exposes child_process · Advisory · patriksimek/vm2 · GitHub

https://github.com/patriksimek/vm2/security/advisories/GHSA-8686-vhfx-7r3j
generic

vm2 before 3.11.7 Authentication Bypass via node: Prefix | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vm2-before-3.11.7-authentication-bypass-via-node-prefix

Vendor Advisories for CVE-2026-92957(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 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. 2026-09-20 03:18 UTCGHSA enrichment
  2. 2026-09-19 23:15 UTCGHSA enrichment
  3. 2026-09-19 19:12 UTCEG score recompute
  4. 2026-09-19 19:12 UTCGHSA enrichment
  5. 2026-09-19 15:07 UTCGHSA enrichment
  6. 2026-09-19 11:02 UTCGHSA enrichment
  7. 2026-09-19 06:59 UTCGHSA enrichment
  8. 2026-09-19 02:55 UTCGHSA enrichment
  9. 2026-09-18 22:52 UTCEG score recompute
  10. 2026-09-18 22:52 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 18:49 UTCGHSA enrichment
  13. 2026-09-18 14:45 UTCGHSA enrichment
  14. 2026-09-18 10:42 UTCGHSA enrichment
  15. 2026-09-18 06:39 UTCGHSA enrichment
  16. 2026-09-18 02:36 UTCGHSA enrichment
  17. 2026-09-17 22:32 UTCGHSA enrichment
  18. 2026-09-17 18:26 UTCEG score recompute
  19. 2026-09-17 18:26 UTCGHSA enrichment
  20. 2026-09-17 17:58 UTCEG score recompute
  21. 2026-09-17 17:58 UTCGHSA enrichment
  22. 2026-09-17 14:22 UTCEG score recompute
  23. 2026-09-17 13:50 UTCEG score recompute
  24. 2026-09-17 13:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-92957?
CVE-2026-92957 is a critical vulnerability published on September 17, 2026. vm2 through 3.11.6 does not normalize node:-prefixed builtin specifiers when evaluating user-supplied negative (deny) entries in a NodeVM wildcard require policy. Although NodeVM strips the node: prefix during require() resolution, negative wildcard entries are matched by exact string comparison…
When was CVE-2026-92957 disclosed?
CVE-2026-92957 was first published in the National Vulnerability Database on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92957 actively exploited?
CVE-2026-92957 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 58.6% of all scored CVEs.
What is the CVSS score of CVE-2026-92957?
CVE-2026-92957 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-92957?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92957, 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-2026-92957

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