CVE-2026-43997

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.0%, top 41% 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
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: Elevated riskExposed: 0

A fix is available — apply it.

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, it is possible to obtain the host Object. There are various ways to use the host Object, to escape the sandbox, one example would be using HostObject.getOwnPropertySymbols to obtain Symbol(nodejs.util.inspect.custom). This vulnerability is fixed in 3.11.0.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
76(Attend)
EG Risk 76/100SSVC: 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
Severity100% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
60%
KEV
Not listed

Published

May 13, 2026

Last Modified

August 6, 2026

Advisory Details (5)

Auto-updated Aug 27, 2026
🔬 Proof of concept available. Patch available. Sources: redhat, github.
redhat Patch Available
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43997.json
github Patch Available🟡 PoC Available

Sandbox Escape · Advisory · patriksimek/vm2 · GitHub

https://github.com/patriksimek/vm2/security/advisories/GHSA-47x8-96vw-5wg6
redhat

2477203 – (CVE-2026-43997) CVE-2026-43997 vm2: vm2: Arbitrary code execution via sandbox escape

https://bugzilla.redhat.com/show_bug.cgi?id=2477203
redhat Patch Available

CVE-2026-43997 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-43997
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:50850

Vendor Advisories for CVE-2026-43997(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 / EcosystemFixed in / PatchReleasedSource
redhatansible-automation-platform/automation-portal:17858542262026-08-05redhat

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 rangeFixed inDependents
vm2—3.11.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 97× 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.

Showing the most recent 100 of 190 total refreshes for this CVE.

  1. 2026-09-01 13:54 UTCEPSS rescore
  2. 2026-08-30 19:17 UTCEPSS rescore
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 14:46 UTCEPSS rescore
  7. 2026-08-25 13:49 UTCEPSS rescore
  8. 2026-08-23 21:33 UTCVendor advisory
  9. 2026-08-23 17:52 UTCEG score recompute
  10. 2026-08-23 17:52 UTCVendor advisory
  11. 2026-08-23 00:19 UTCEPSS rescore
  12. 2026-08-21 23:49 UTCEPSS rescore
  13. 2026-08-20 22:55 UTCEPSS rescore
  14. 2026-08-20 20:57 UTCEG score recompute
  15. 2026-08-20 20:57 UTCVendor advisory
  16. 2026-08-19 17:04 UTCEPSS rescore
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 14:42 UTCEG score recompute
  19. 2026-08-17 14:42 UTCVendor advisory
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 10:39 UTCEG score recompute
  22. 2026-08-17 10:39 UTCVendor advisory
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 11:19 UTCVendor advisory
  25. 2026-08-16 07:41 UTCVendor advisory
Show 75 more
  1. 2026-08-16 04:03 UTCEG score recompute
  2. 2026-08-16 04:03 UTCVendor advisory
  3. 2026-08-16 02:14 UTCEPSS rescore
  4. 2026-08-15 01:30 UTCEPSS rescore
  5. 2026-08-15 00:16 UTCVendor advisory
  6. 2026-08-14 20:39 UTCVendor advisory
  7. 2026-08-14 17:02 UTCVendor advisory
  8. 2026-08-14 13:24 UTCVendor advisory
  9. 2026-08-14 09:47 UTCVendor advisory
  10. 2026-08-14 06:10 UTCVendor advisory
  11. 2026-08-14 02:32 UTCEG score recompute
  12. 2026-08-14 02:32 UTCVendor advisory
  13. 2026-08-13 22:00 UTCEPSS rescore
  14. 2026-08-13 09:59 UTCVendor advisory
  15. 2026-08-13 06:22 UTCVendor advisory
  16. 2026-08-13 02:42 UTCVendor advisory
  17. 2026-08-12 23:05 UTCVendor advisory
  18. 2026-08-12 19:28 UTCVendor advisory
  19. 2026-08-12 15:50 UTCEG score recompute
  20. 2026-08-12 15:50 UTCVendor advisory
  21. 2026-08-12 13:51 UTCEPSS rescore
  22. 2026-08-11 22:57 UTCVendor advisory
  23. 2026-08-11 19:14 UTCVendor advisory
  24. 2026-08-11 15:28 UTCEG score recompute
  25. 2026-08-11 15:28 UTCVendor advisory
  26. 2026-08-11 13:43 UTCEPSS rescore
  27. 2026-08-11 08:13 UTCVendor advisory
  28. 2026-08-11 04:34 UTCVendor advisory
  29. 2026-08-11 00:57 UTCEG score recompute
  30. 2026-08-11 00:57 UTCVendor advisory
  31. 2026-08-11 00:00 UTCEPSS rescore
  32. 2026-08-10 14:07 UTCVendor advisory
  33. 2026-08-10 10:30 UTCVendor advisory
  34. 2026-08-10 06:53 UTCVendor advisory
  35. 2026-08-10 03:16 UTCVendor advisory
  36. 2026-08-09 23:39 UTCVendor advisory
  37. 2026-08-09 20:02 UTCVendor advisory
  38. 2026-08-09 16:24 UTCEG score recompute
  39. 2026-08-09 16:24 UTCVendor advisory
  40. 2026-08-09 13:46 UTCEPSS rescore
  41. 2026-08-09 12:47 UTCVendor advisory
  42. 2026-08-09 09:09 UTCVendor advisory
  43. 2026-08-09 05:32 UTCVendor advisory
  44. 2026-08-09 01:55 UTCEG score recompute
  45. 2026-08-09 01:55 UTCVendor advisory
  46. 2026-08-08 16:37 UTCEPSS rescore
  47. 2026-08-08 12:14 UTCVendor advisory
  48. 2026-08-08 08:37 UTCVendor advisory
  49. 2026-08-08 04:59 UTCVendor advisory
  50. 2026-08-08 01:22 UTCVendor advisory
  51. 2026-08-07 21:45 UTCVendor advisory
  52. 2026-08-07 18:08 UTCEG score recompute
  53. 2026-08-07 18:08 UTCVendor advisory
  54. 2026-08-07 14:30 UTCVendor advisory
  55. 2026-08-07 10:53 UTCVendor advisory
  56. 2026-08-07 07:05 UTCVendor advisory
  57. 2026-08-07 01:23 UTCVendor advisory
  58. 2026-08-06 20:59 UTCVendor advisory
  59. 2026-08-06 17:22 UTCEG score recompute
  60. 2026-08-06 17:22 UTCVendor advisory
  61. 2026-08-06 13:46 UTCEPSS rescore
  62. 2026-08-06 13:39 UTCVendor advisory
  63. 2026-08-06 12:10 UTCVendor advisory
  64. 2026-08-06 08:32 UTCVendor advisory
  65. 2026-08-06 04:55 UTCVendor advisory
  66. 2026-08-06 01:18 UTCVendor advisory
  67. 2026-08-05 21:41 UTCEG score recompute
  68. 2026-08-05 19:17 UTCEPSS rescore
  69. 2026-08-04 15:10 UTCEPSS rescore
  70. 2026-08-04 10:38 UTCEPSS rescore
  71. 2026-08-03 19:09 UTCEG score recompute
  72. 2026-08-03 10:36 UTCEPSS rescore
  73. 2026-08-02 03:10 UTCEG score recompute
  74. 2026-08-02 02:27 UTCEPSS rescore
  75. 2026-08-01 19:54 UTCEG score recompute

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43997?
CVE-2026-43997 is a critical vulnerability published on May 13, 2026. vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, it is possible to obtain the host Object. There are various ways to use the host Object, to escape the sandbox, one example would be using HostObject.getOwnPropertySymbols to obtain Symbol(nodejs.util.inspect.custom). This vulnerability…
When was CVE-2026-43997 disclosed?
CVE-2026-43997 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43997 actively exploited?
CVE-2026-43997 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 40.3% of all scored CVEs.
What is the CVSS score of CVE-2026-43997?
CVE-2026-43997 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-43997?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43997, 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

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