CVE-2026-70477

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 44% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: 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 3.1.3, a prompt injection sent to a chatflow using a CSV Agent node can cause the LLM to respond with a malicious Python script that bypasses the blocklist validator and executes in an unsandboxed Pyodide environment. The specific flaw exists within the run method of the CSV_Agents class, where untrusted data is used to construct an LLM prompt and the resulting pythonCode is validated by validatePythonCodeForDataFrame before execution. An attacker can leverage this to execute arbitrary code in the context of the service account. This issue is fixed in 3.1.3.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
56%
KEV
Not listed

Published

August 4, 2026

Last Modified

September 11, 2026

Advisory Details (4)

Auto-updated Sep 18, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit, github_pr.
github Patch Available🟡 PoC Available

CSV Agent Prompt Injection Remote Code Execution Vulnerability · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-5xvg-pmgg-3mxr
github_release Patch Available

[email protected]

Patch available: FlowiseAI/Flowise [email protected]

https://github.com/FlowiseAI/Flowise/releases/tag/[email protected]
github_pr Patch Available

Fix Flowise 606

Patch available: FlowiseAI/Flowise [email protected] (PR #6499 merged 2026-06-10)

https://github.com/FlowiseAI/Flowise/pull/6499
github_commit Patch Available

commit f4e2794f6a57 (FlowiseAI/Flowise)

Patch available: FlowiseAI/Flowise [email protected] (contains commit f4e2794f6a57)

https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c

Vendor Advisories for CVE-2026-70477(1)

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

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFixed inDependents
flowise—3.1.3—
flowise-components—3.1.3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 55× 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. 2026-09-18 22:21 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 01:08 UTCEG score recompute
  4. 2026-09-17 01:10 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 11:14 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 06:54 UTCEG score recompute
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-13 20:27 UTCEG score recompute
  11. 2026-09-12 18:12 UTCEG score recompute
  12. 2026-09-12 15:02 UTCEPSS rescore
  13. 2026-09-11 21:16 UTCEG score recompute▲ 0.30
  14. 2026-09-11 21:16 UTCNVD updateCVSS v3 → 9.8
  15. 2026-09-11 19:18 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 14:46 UTCEG score recompute
  18. 2026-09-10 12:47 UTCEG score recompute
  19. 2026-09-10 09:35 UTCEPSS rescore
  20. 2026-09-09 06:34 UTCEG score recompute
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-07 18:30 UTCEG score recompute
  23. 2026-09-07 16:01 UTCEPSS rescore
  24. 2026-09-06 15:35 UTCEG score recompute
  25. 2026-09-06 13:47 UTCEPSS rescore
Show 65 more
  1. 2026-09-05 18:32 UTCEG score recompute
  2. 2026-09-05 15:31 UTCEPSS rescore
  3. 2026-09-04 14:17 UTCEG score recompute
  4. 2026-09-04 10:07 UTCEG score recompute
  5. 2026-09-04 05:07 UTCEPSS rescore
  6. 2026-09-03 07:27 UTCEG score recompute
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 20:48 UTCEG score recompute
  9. 2026-09-01 13:54 UTCEPSS rescore
  10. 2026-09-01 07:29 UTCEG score recompute
  11. 2026-09-01 04:40 UTCEPSS rescore
  12. 2026-08-30 23:00 UTCEG score recompute
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:56 UTCEG score recompute
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-29 21:46 UTCEG score recompute
  17. 2026-08-28 21:42 UTCEPSS rescore
  18. 2026-08-27 19:57 UTCEG score recompute
  19. 2026-08-26 19:09 UTCEG score recompute
  20. 2026-08-26 14:47 UTCEPSS rescore
  21. 2026-08-25 14:31 UTCEG score recompute
  22. 2026-08-25 13:49 UTCEPSS rescore
  23. 2026-08-24 17:42 UTCEG score recompute
  24. 2026-08-24 12:48 UTCEG score recompute
  25. 2026-08-23 03:27 UTCEG score recompute
  26. 2026-08-23 00:19 UTCEPSS rescore
  27. 2026-08-22 02:27 UTCEG score recompute
  28. 2026-08-21 23:49 UTCEPSS rescore
  29. 2026-08-21 01:12 UTCEG score recompute
  30. 2026-08-20 22:56 UTCEPSS rescore
  31. 2026-08-19 19:45 UTCEG score recompute
  32. 2026-08-19 17:04 UTCEPSS rescore
  33. 2026-08-18 18:16 UTCEG score recompute
  34. 2026-08-18 13:49 UTCEPSS rescore
  35. 2026-08-18 13:49 UTCEPSS rescore
  36. 2026-08-17 15:06 UTCEG score recompute
  37. 2026-08-17 13:47 UTCEPSS rescore
  38. 2026-08-16 18:17 UTCEG score recompute
  39. 2026-08-16 14:56 UTCEPSS rescore
  40. 2026-08-16 14:56 UTCEPSS rescore
  41. 2026-08-16 05:47 UTCEG score recompute
  42. 2026-08-16 02:15 UTCEPSS rescore
  43. 2026-08-15 04:48 UTCEG score recompute
  44. 2026-08-15 01:31 UTCEPSS rescore
  45. 2026-08-13 23:38 UTCEG score recompute
  46. 2026-08-13 22:00 UTCEPSS rescore
  47. 2026-08-12 14:11 UTCEG score recompute
  48. 2026-08-12 13:51 UTCEPSS rescore
  49. 2026-08-11 17:22 UTCEG score recompute
  50. 2026-08-11 00:34 UTCEG score recompute
  51. 2026-08-11 00:00 UTCEPSS rescore
  52. 2026-08-09 15:15 UTCEG score recompute
  53. 2026-08-09 13:47 UTCEPSS rescore
  54. 2026-08-08 18:26 UTCEG score recompute
  55. 2026-08-08 16:37 UTCEPSS rescore
  56. 2026-08-07 17:28 UTCEG score recompute
  57. 2026-08-06 16:29 UTCEG score recompute
  58. 2026-08-06 13:47 UTCEPSS rescore
  59. 2026-08-05 19:39 UTCEG score recompute
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-05 19:17 UTCEPSS rescore
  62. 2026-08-05 15:29 UTCEG score recompute
  63. 2026-08-04 20:32 UTCEG score recompute
  64. 2026-08-04 20:06 UTCEG score recompute
  65. 2026-08-04 20:06 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-70477?
CVE-2026-70477 is a critical vulnerability published on August 4, 2026. Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, a prompt injection sent to a chatflow using a CSV Agent node can cause the LLM to respond with a malicious Python script that bypasses the blocklist validator and executes in an unsandboxed…
When was CVE-2026-70477 disclosed?
CVE-2026-70477 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70477 actively exploited?
CVE-2026-70477 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 44.0% of all scored CVEs.
What is the CVSS score of CVE-2026-70477?
CVE-2026-70477 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-70477?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70477, 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-2026-70477

Explore →

Is Your Infrastructure Affected by CVE-2026-70477?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs