CVE-2026-41269· NVD / CVE Program· CNA GitHub_M

Flowise: File Upload Validation Bypass in createAttachment

Noroxi assessment

Priority: Monitor (action score 35/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.69% (FIRST EPSS); higher than 52% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: FlowiseAI Flowise 3.1.0.

Low priority for now. Upgrade to FlowiseAI Flowise 3.1.0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the Chatflow configuration file upload settings can be modified to allow the application/javascript MIME type. This lets an attacker upload .js files even though the frontend doesn’t normally allow JavaScript uploads. This enables attackers to persistently store malicious Node.js web shells on the server, potentially leading to Remote Code Execution (RCE). This vulnerability is fixed in 3.1.0.

HighCVSS 8.8 · v3.1—No exploit Fix available

GHSA-rh7v-6w34-w2rr

Published: Apr 23, 2026
Updated: Jun 17, 2026
EPSS: 0.6% · 52th percentile
CWE: CWE-434

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 35 / 40 · 8.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.6%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 8.8
CNA · GitHub_M: 7.1; 1.7 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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 flowisebefore 3.1.0

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
- < 3.1.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
npm	flowise	before 3.1.0	3.1.0

Same product

flowiseai: all records

Other highest-scoring records for the same primary product.

CVE-2025-59528Flowise has Remote Code Execution vulnerability
66This week
CVE-2025-8943Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers
62This week
CVE-2026-41264Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability
60This week

Published before and after this one in the same product

← EarlierCVE-2026-41267Apr 23, 2026 · Flowise: Improper Mass Assignment in Account Registration Enables Unauthorized Organization Association
39Monitor
← EarlierCVE-2026-41268Apr 23, 2026 · Flowise: Flowise Parameter Override Bypass Remote Command Execution
39Monitor
Later →CVE-2026-41270Apr 23, 2026 · Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function Sandbox
33Monitor

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	3.1.0 · description	Vendor (CNA)
npm:flowise	3.1.0	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days

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 researchers

Finders, 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-2025-26319415 days apartFlowiseAI Flowise v2.2.6 was discovered to contain an arbitrary file upload vulnerability in /api/v1/attachments.
56Plan
CVE-2025-61687199 days apartFlowiseAI/Flosise has File Upload vulnerability
38Monitor
CVE-2026-3082147 days apartFlowise: Arbitrary File Upload via MIME Spoofing
32Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-3082447 days apartFlowise: Missing Authentication on NVIDIA NIM Endpoints
31Monitor
CVE-2026-412760 days apartFlowise: AccountService resetPassword Authentication Bypass Vulnerability
30Monitor

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.
A low-privileged account is enough.
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

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-434 · Unrestricted Upload of File with Dangerous Type

CVSS vector

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

nvd-primary

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)

Accessing Functionality Not Properly Constrained by ACLsCAPEC-1likelihood: High · High

ATT&CK techniques

Hijack Execution Flow: ServicesFile Permissions WeaknessT1574.010

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

All records