CVE-2026-46442

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 3.5%, top 12% 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
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.9Exploit: Elevated riskExposed: 0

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

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured — the common deployment case — Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2.

CVSS v3
9.9
EG Score
9.9(medium)
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
3%
EPSS %ILE
88%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2
github_release Patch Available

[email protected]

Patch available: FlowiseAI/Flowise [email protected]

https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2

Vendor Advisories for CVE-2026-46442(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
flowise—3.1.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× 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.

  1. 2026-08-15 02:47 UTCEG score recompute
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-13 22:28 UTCEG score recompute
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-12 17:09 UTCEG score recompute
  6. 2026-08-12 13:51 UTCEPSS rescore
  7. 2026-08-11 17:58 UTCEG score recompute
  8. 2026-08-11 01:26 UTCEG score recompute
  9. 2026-08-11 00:00 UTCEPSS rescore
  10. 2026-08-09 17:33 UTCEG score recompute
  11. 2026-08-09 13:46 UTCEPSS rescore
  12. 2026-08-08 17:17 UTCEG score recompute
  13. 2026-08-08 16:37 UTCEPSS rescore
  14. 2026-08-07 16:45 UTCEG score recompute
  15. 2026-08-06 16:30 UTCEG score recompute
  16. 2026-08-06 13:47 UTCEPSS rescore
  17. 2026-08-05 20:16 UTCEG score recompute
  18. 2026-08-05 19:17 UTCEPSS rescore
  19. 2026-08-04 16:22 UTCEG score recompute
  20. 2026-08-04 15:10 UTCEPSS rescore
  21. 2026-08-04 10:39 UTCEPSS rescore
  22. 2026-08-03 15:21 UTCEG score recompute
  23. 2026-08-03 10:36 UTCEPSS rescore
  24. 2026-08-02 03:02 UTCEG score recompute
  25. 2026-08-02 02:27 UTCEPSS rescore
Show 72 more
  1. 2026-08-01 10:50 UTCEG score recompute
  2. 2026-08-01 04:16 UTCEPSS rescore
  3. 2026-07-31 04:55 UTCEG score recompute
  4. 2026-07-30 16:28 UTCEPSS rescore
  5. 2026-07-30 01:30 UTCEPSS rescore
  6. 2026-07-29 06:27 UTCEG score recompute
  7. 2026-07-28 15:36 UTCEPSS rescore
  8. 2026-07-27 18:32 UTCEG score recompute
  9. 2026-07-27 14:13 UTCEPSS rescore
  10. 2026-07-26 21:42 UTCEG score recompute
  11. 2026-07-26 14:54 UTCEPSS rescore
  12. 2026-07-26 14:54 UTCEPSS rescore
  13. 2026-07-26 07:13 UTCEG score recompute
  14. 2026-07-25 14:18 UTCEPSS rescore
  15. 2026-07-24 14:17 UTCEPSS rescore
  16. 2026-07-23 14:18 UTCEPSS rescore
  17. 2026-07-23 03:17 UTCEG score recompute
  18. 2026-07-22 14:08 UTCEPSS rescore
  19. 2026-07-21 15:24 UTCEPSS rescore
  20. 2026-07-20 17:08 UTCEPSS rescore
  21. 2026-07-19 14:31 UTCEPSS rescore
  22. 2026-07-19 02:29 UTCEPSS rescore
  23. 2026-07-18 10:04 UTCEPSS rescore
  24. 2026-07-16 17:03 UTCEPSS rescore
  25. 2026-07-15 16:57 UTCEPSS rescore
  26. 2026-07-15 02:00 UTCEPSS rescore
  27. 2026-07-13 22:30 UTCEPSS rescore
  28. 2026-07-13 06:13 UTCEPSS rescore
  29. 2026-07-12 05:46 UTCEPSS rescore
  30. 2026-07-11 08:27 UTCEPSS rescore
  31. 2026-07-09 19:10 UTCEPSS rescore
  32. 2026-07-08 15:16 UTCEPSS rescore
  33. 2026-07-07 13:46 UTCEPSS rescore
  34. 2026-07-06 16:27 UTCEPSS rescore
  35. 2026-07-06 02:23 UTCEPSS rescore
  36. 2026-07-05 02:30 UTCEPSS rescore
  37. 2026-07-04 06:31 UTCEPSS rescore
  38. 2026-07-01 15:07 UTCEPSS rescore
  39. 2026-06-30 23:22 UTCEPSS rescore
  40. 2026-06-29 14:06 UTCEPSS rescore
  41. 2026-06-29 14:06 UTCEPSS rescore
  42. 2026-06-28 14:07 UTCEPSS rescore
  43. 2026-06-28 04:56 UTCEPSS rescore
  44. 2026-06-28 04:56 UTCEPSS rescore
  45. 2026-06-27 03:08 UTCEPSS rescore
  46. 2026-06-25 13:49 UTCEPSS rescore
  47. 2026-06-24 14:05 UTCEPSS rescore
  48. 2026-06-23 21:33 UTCEPSS rescore
  49. 2026-06-23 21:33 UTCEPSS rescore
  50. 2026-06-22 14:25 UTCEPSS rescore
  51. 2026-06-22 14:25 UTCEPSS rescore
  52. 2026-06-21 14:56 UTCEPSS rescore
  53. 2026-06-21 14:56 UTCEPSS rescore
  54. 2026-06-21 01:59 UTCEPSS rescore
  55. 2026-06-21 01:59 UTCEPSS rescore
  56. 2026-06-19 19:26 UTCEPSS rescore
  57. 2026-06-19 19:26 UTCEPSS rescore
  58. 2026-06-18 17:52 UTCEPSS rescore
  59. 2026-06-18 17:52 UTCEPSS rescore
  60. 2026-06-17 17:53 UTCEPSS rescore
  61. 2026-06-16 17:53 UTCEPSS rescore
  62. 2026-06-15 17:49 UTCEPSS rescore
  63. 2026-06-13 23:00 UTCEPSS rescore
  64. 2026-06-12 23:12 UTCEPSS rescore
  65. 2026-06-12 23:12 UTCEPSS rescore
  66. 2026-06-11 14:00 UTCEPSS rescore
  67. 2026-06-11 08:27 UTCEG score recompute▲ 0.50
  68. 2026-06-11 05:10 UTCNVD updateCVSS v3 → 9.9
  69. 2026-06-10 22:18 UTCEPSS rescore
  70. 2026-06-10 13:22 UTCEPSS rescore
  71. 2026-06-10 13:22 UTCEPSS rescore
  72. 2026-06-08 15:42 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-46442.yaml
    First seen Jan 1, 2026

    Flowise < 3.1.2 - node-custom-function Unauthorized RCE

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-46442?
CVE-2026-46442 is a critical vulnerability published on June 8, 2026. Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When…
When was CVE-2026-46442 disclosed?
CVE-2026-46442 was first published in the National Vulnerability Database on June 8, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46442 actively exploited?
CVE-2026-46442 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 11.9% of all scored CVEs.
What is the CVSS score of CVE-2026-46442?
CVE-2026-46442 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-46442?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46442, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-46442

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