Flowise has Remote Code Execution vulnerability
Flowise is a drag & drop user interface to build a customized large language model flow. In version 3.0.5, Flowise is vulnerable to remote code execution. The CustomMCP node allows users to input configuration settings for connecting to an external MCP server. This node parses the user-provided mcpServerConfig string to build the MCP server configuration. However, during this process, it executes JavaScript code without any security validation. Specifically, inside the convertToValidJSONString function, user input is directly passed to the Function() constructor, which evaluates and executes the input as JavaScript code. Since this runs with full Node.js runtime privileges, it can access dangerous modules such as child_process and fs. This issue has been patched in version 3.0.6.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Sep 22, 2025
- Updated
- Jun 17, 2026
- EPSS
- 86.2% · 100th percentile
- CWE
- CWE-94
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Report tools
Action score
66
This week
Don’t wait for the next maintenance window.
- CVSS
- 40 / 40 · 10.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 26 / 30 · 86.2%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 10.0
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| flowiseai | flowise | cpe:2.3:a:flowiseai:flowise |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- flowiseai flowise3.0.5
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
FlowiseAI Flowise
- = 3.0.5affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| npm | flowise | from 3.0.5 · before 3.0.6 | 3.0.6 |
Same product
flowiseai: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-8943Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers59Plan
- CVE-2025-26319FlowiseAI Flowise v2.2.6 was discovered to contain an arbitrary file upload vulnerability in /api/v1/attachments.56Plan
- CVE-2025-58434Flowise Cloud and Local Deployments have Unauthenticated Password Reset Token Disclosure that Leads to Account Takeover54Plan
- CVE-2024-31621An issue in FlowiseAI Inc Flowise v.1.6.2 and before allows a remote attacker to execute arbitrary code via a crafted script to the api/v1 c48Plan
- CVE-2024-8181Flowise Authentication Bypass46Plan
- CVE-2025-61913Flowise is vulnerable to arbitrary file read, arbitrary file write43Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| FlowiseAI Flowise | 3.0.6 · description | Vendor (CNA) |
| npm:flowise | 3.0.6 | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×1
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×12
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | webapps | 2025-10-31 |
| Metasploit module | exploit/multi/http/flowise_js_rceFlowise JS Injection RCEexploit | 2025-09-13 |
| Nuclei detection template | Nuclei template CVE-2025-59528 | — |
| Proof-of-concept repository on GitHub | stars:0 | 2025-11-02 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-04-13 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-04-13 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-04-15 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-04-15 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-05-01 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-05-16 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-05-17 |
| Proof-of-concept repository on GitHub | stars:0 | 2026-06-09 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Metasploit-10 d
- Published
- First PoC+38 d
- TodaySep 30, 2026+373 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2024-31621511 days apartAn issue in FlowiseAI Inc Flowise v.1.6.2 and before allows a remote attacker to execute arbitrary code via a crafted script to the api/v1 c48Plan
- CVE-2026-52098353 days apartAn issue in Flowise 3.1.2 allows a remote attacker to execute arbitrary code via the /api/v1/prediction/<flowId> endpoint39Monitor
- CVE-2026-41137213 days apartFlowise: Code Injection in CSVAgent leads to Authenticated RCE38Monitor
- CVE-2026-46442259 days apartFlowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape38Monitor
- CVE-2026-70477316 days apartFlowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability38Monitor
- CVE-2026-69264316 days apartFlowise: RCE via CSVAgent csvFile data URI base64 segment is interpolated into Python source without validation37Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-94 · Improper Control of Generation of Code ('Code Injection')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L132
- github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L220
- github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L262-L270
- github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/controllers/nodes/index.ts#L57-L78
- github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/routes/node-load-methods/index.ts#L5
- github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/services/nodes/index.ts#L91-L94
- github.com/FlowiseAI/Flowise/releases/tag/flowise%403.0.6
Vendor advisories and official records. Exploit/PoC links are deliberately left out.