Vulnerability report

Exploitation Attempts Observed Confirmed Confidence Not in CISA KEV

CVE-2026-69255

Flowise CSV Agent Remote Code Execution

FlowiseAI / Flowise · affected before 3.1.3

Watch CVE-2026-69255 Browse KEV feed
Severity
CVSS 9.2 · Critical
Confidence
Confirmed
Exploit status
Exploitation Attempts Observed in the Wild
EPSS
0.6%
First observed
18 Aug 2026
Last observed
15 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-69255 is an unauthenticated vulnerability affecting FlowiseAI Flowise. Flowise is a drag & drop user interface to build a customized large language model flow.

Have exploitation attempts been observed?

Yes. Previdian sensors have observed 17 exploitation attempts, 8 unique attacker IPs, and 6 countries targeting CVE-2026-69255. First observed Aug 18, 2026; last observed Oct 15, 2026. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

FlowiseAI / Flowise affected before 3.1.3.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Flowise is a drag & drop user interface to build a customized large language model flow

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.

FlowiseAI Affected
Flowise
Before 3.1.3
Published
04 Aug 2026
Exploitation Attempts Reported
18 Aug 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

nodejs python

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation Attempts Observed in the Wild

Previdian

Recorded 18 Aug 2026

Previdian sensors observed exploitation attempts targeting this vulnerability before a third-party report.

Exploitation Attempts Observed

Previdian sensor

First observed 18 Aug 2026

Previdian sensors observed exploitation attempts targeting this vulnerability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
Previdian Sensors First 2026-09-15 19:57 UTC
The Hacker News 2026-10-15 09:31 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

Previdian Sensor Observations

Previdian sensor observations are exploitation attempts targeting this vulnerability. They do not show that the target was vulnerable or that the attempt succeeded. The cards and chart show volume, unique attackers, and daily activity.

17

Attempts observed

8

Unique attacker IPs

6

Attacker countries

CN · DE · NL · SE · SG · US

1

Sensors observed

CVE-2026-69255 exploitation attempts over the last 87 days

Daily events observed by Previdian sensors

Updated 11 Nov 2026

0
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
2
0
1
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
17 Aug 4 Sep 22 Sep 10 Oct 11 Nov

First observed 18 Aug 2026 · Last observed 15 Oct 2026

Pro adds sensor region and window summaries. Enterprise adds raw IPs, paths, User-Agents, and payloads.

Start 14-day Pro trial

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
1
1
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

Previdian virtual patch guidance is available for this CVE.

AWS WAF Cloudflare ModSecurity

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Virtual Patch Detail

Compensating WAF rules for this CVE.

Available

Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to Previdian Enterprise users.

Talk to Sales Learn About Virtual Patches

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

9.2 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

0.6%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

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

Recent mention · The Hacker News

Langflow's Critical Authenticated RCE Flaw Targeted in 1,423 Honeypot Exploit Attempts

Ravie LakshmananOct 15, 2026Vulnerability / Artificial Intelligence Threat actors are exploiting a critical security flaw in Langflow, according to an alert from Previdian. Langflow is an open-source platform that allows developers to build artificial intelligence (AI)...

Read full advisory

All CVSS Scores

CVSS v4.0 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

CVSS v3.1 8.8 High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Timeline

From disclosure to observed exploitation attempts

  1. 09:31 UTC

    KEV confirmed by The Hacker News

    Exploitation attempts reported by an external source

  2. 13:54 UTC

    Virtual patch available

    Compensating WAF rule available to block exploitation

  3. 08:09 UTC

    Indicators of compromise added (8)

    Indicators of compromise recorded

  4. 08:09 UTC

    Observed by Previdian sensors

    Previdian sensors observed exploitation attempts targeting this vulnerability.

  5. 15:39 UTC

    CVE published

    Vulnerability disclosed publicly

  6. 19:54 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-69255

Sample API response 
{
  "cve_id": "CVE-2026-69255",
  "confidence": "Confirmed",
  "cvss_score": 9.2,
  "cvss_estimated": false,
  "epss_score": 0.00602,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 17, "sensors": 1 }
}