CVE-2026-43997

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 50% 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, nvd
Elevated
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 10.0Exploit: NoneExposed: 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 3.11.0, 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)
EPSS
58.1%
KEV
Not listed

Published

May 13, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github, redhat.
redhat
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-details

https://access.redhat.com/security/cve/CVE-2026-43997

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 7× in last 7d / 49× 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 191 total refreshes for this CVE.

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

Related CVEs(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 July 15, 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 58.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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