CVE-2026-92956

CRITICALPre-NVD 10.010.0
EchelonGraph scoreHIGH confidence

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

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-05. A secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — Patch released this week

Also known asEUVD-2026-81605 (ENISA EUVD) · GHSA-538q-xxpg-6h4r (GitHub Security Advisories) · GHSA-wjwh-qqvp-g4p4 (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
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: 0.5%CVSS: 10.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default new VM() sandbox when running on Node.js 26. WebAssembly.compileStreaming and WebAssembly.instantiateStreaming can produce a raw host-realm Promise that rejects with a host-realm error object; by controlling Symbol.species via Promise.prototype.finally, sandbox code receives that raw host error, walks from the host error constructor to the host Function constructor, and recovers the real host process object, gaining host Node.js capabilities (e.g. access to host modules such as fs) in the context of the process running the sandbox. No NodeVM, require permission, host object injection, or otherwise unsafe configuration is required. This is a bypass of the fix for GHSA-6j2x-vhqr-qr7q, which removed the JSPI entry points WebAssembly.promising and WebAssembly.Suspending. The issue is fixed in 3.11.7.

CVSS v3
10.0
EG Score
10.0CRITICALhigh confidence
EG Risk
60
EG Risk 60/100

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)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 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
0.5%
EPSS %ILE
43rd
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 (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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

September 17, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Oct 30, 2026
🔬 Proof of concept available. Patch available. Sources: github.
Web page

vm2 3.10.1 through 3.11.6 Sandbox Escape via WebAssembly.compileStreaming | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vm2-3.10.1-through-3.11.6-sandbox-escape-via-webassembly-compilestreaming
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

vm2 sandbox escape via WebAssembly.compileStreaming Promise species bypass · Advisory · patriksimek/vm2 · GitHub

https://github.com/patriksimek/vm2/security/advisories/GHSA-wjwh-qqvp-g4p4

Patch Availability(7)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhdh/rhdh-hub-rhel9:17931178132026-10-28redhat
redhatansible-automation-platform/bootc-automation-portal-rhel9:17918656602026-10-13redhat
redhatansible-automation-platform/automation-portal:17912953792026-10-12redhat
redhatansible-automation-platform/automation-portal:17912937802026-10-12redhat
redhatrhdh/rhdh-hub-rhel9:17913114952026-10-08redhat
redhatrhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend:17912512822026-10-06redhat
npmvm2 @ 3.11.7 (fixes >= 3.10.1, <= 3.11.6)—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)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
vm2—
  • 3.10.1 up to 3.11.7: fixed in 3.11.7
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 131× 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.

Showing the most recent 100 of 261 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 161 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-11-01 15:31 UTCVendor advisory
  3. 2026-11-01 15:30 UTCGHSA enrichmentGHSA-wjwh-qqvp-g4p4 · GitHub severity CRITICAL · GitHub CVSS 10.0
  4. 2026-11-01 07:37 UTCGHSA enrichmentGHSA-wjwh-qqvp-g4p4 · GitHub severity CRITICAL · GitHub CVSS 10.0
  5. 2026-11-01 07:37 UTCEG score recompute
  6. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-31 15:34 UTCEG score recompute
  8. 2026-10-31 15:34 UTCVendor advisory
  9. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-30 15:38 UTCEG score recompute
  11. 2026-10-30 15:38 UTCVendor advisory
  12. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  13. 2026-10-29 15:41 UTCEG score recompute
  14. 2026-10-29 15:41 UTCVendor advisory
  15. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  16. 2026-10-28 15:34 UTCEG score recompute
  17. 2026-10-28 15:34 UTCVendor advisory
  18. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-10-27 15:38 UTCEG score recompute
  20. 2026-10-27 15:38 UTCVendor advisory
  21. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-10-26 15:34 UTCEG score recompute
  23. 2026-10-26 15:34 UTCVendor advisory
  24. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-10-25 15:15 UTCVendor advisory
Show 75 more
  1. 2026-10-25 13:50 UTCEG score recompute
  2. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-10-24 15:18 UTCEG score recompute
  4. 2026-10-24 15:18 UTCVendor advisory
  5. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  6. 2026-10-23 15:22 UTCEG score recompute
  7. 2026-10-23 15:22 UTCVendor advisory
  8. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  9. 2026-10-22 15:25 UTCEG score recompute
  10. 2026-10-22 15:25 UTCVendor advisory
  11. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  12. 2026-10-21 15:25 UTCEG score recompute
  13. 2026-10-21 15:25 UTCVendor advisory
  14. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  15. 2026-10-20 15:28 UTCEG score recompute
  16. 2026-10-20 15:28 UTCVendor advisory
  17. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  18. 2026-10-19 15:28 UTCEG score recompute
  19. 2026-10-19 15:28 UTCVendor advisory
  20. 2026-10-18 15:31 UTCVendor advisory
  21. 2026-10-18 02:59 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  23. 2026-10-17 15:34 UTCEG score recompute
  24. 2026-10-17 15:34 UTCVendor advisory
  25. 2026-10-17 06:57 UTCEG score recompute
  26. 2026-10-17 06:57 UTCVendor advisory
  27. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  28. 2026-10-16 06:59 UTCEG score recompute
  29. 2026-10-16 06:59 UTCVendor advisory
  30. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  31. 2026-10-15 05:42 UTCEG score recompute
  32. 2026-10-15 05:42 UTCVendor advisory
  33. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  34. 2026-10-14 01:20 UTCEG score recompute
  35. 2026-10-14 01:20 UTCVendor advisory
  36. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  37. 2026-10-12 21:33 UTCEG score recompute
  38. 2026-10-12 21:33 UTCVendor advisory
  39. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  40. 2026-10-12 14:44 UTCEG score recompute
  41. 2026-10-12 05:02 UTCVendor advisory
  42. 2026-10-11 23:15 UTCVendor advisory
  43. 2026-10-11 19:21 UTCVendor advisory
  44. 2026-10-11 19:12 UTCEG score recompute
  45. 2026-10-11 16:29 UTCEG score recompute
  46. 2026-10-11 15:26 UTCEG score recompute
  47. 2026-10-11 15:26 UTCVendor advisory
  48. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  49. 2026-10-11 13:43 UTCEG score recompute
  50. 2026-10-11 11:32 UTCEG score recompute
  51. 2026-10-11 11:32 UTCVendor advisory
  52. 2026-10-11 07:39 UTCVendor advisory
  53. 2026-10-11 03:43 UTCVendor advisory
  54. 2026-10-10 22:41 UTCEG score recompute
  55. 2026-10-10 22:41 UTCVendor advisory
  56. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  57. 2026-10-10 17:33 UTCVendor advisory
  58. 2026-10-10 13:33 UTCVendor advisory
  59. 2026-10-10 09:37 UTCVendor advisory
  60. 2026-10-10 05:44 UTCVendor advisory
  61. 2026-10-10 01:50 UTCVendor advisory
  62. 2026-10-09 21:56 UTCEG score recompute
  63. 2026-10-09 21:56 UTCVendor advisory
  64. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  65. 2026-10-09 18:01 UTCVendor advisory
  66. 2026-10-09 13:30 UTCVendor advisory
  67. 2026-10-09 05:44 UTCVendor advisory
  68. 2026-10-09 01:50 UTCVendor advisory
  69. 2026-10-08 21:57 UTCVendor advisory
  70. 2026-10-08 18:03 UTCEG score recompute
  71. 2026-10-08 18:03 UTCVendor advisory
  72. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  73. 2026-10-08 10:50 UTCVendor advisory
  74. 2026-10-08 06:51 UTCVendor advisory
  75. 2026-10-08 02:57 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-92956?
CVE-2026-92956 is a critical-severity vulnerability; its CVE record was published on September 17, 2026. vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default new VM() sandbox when running on Node.js 26. WebAssembly.compileStreaming and WebAssembly.instantiateStreaming can produce a raw host-realm Promise that rejects with a host-realm error object; by controlling…
When was CVE-2026-92956 made public?
CVE-2026-92956 was made public on August 24, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 17, 2026. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-92956 actively exploited?
CVE-2026-92956 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-92956?
CVE-2026-92956 has a CVSS base score of 10.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-92956?
A fix for CVE-2026-92956 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-92956 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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