HighVulnerabilityLLM-specific

CVE-2026-41269: Flowise arbitrary JavaScript upload through Chatflow file upload settings

Source: NVD(opens in a new tab)
Identifier: CVE-2026-41269
Published: April 23, 2026
Record updated: October 9, 2026

Affected: flowise <= 3.0.13
Fixed in: 3.1.0
released March 16, 2026, 38 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.5%

Summary

Flowise, a drag-and-drop interface for building customized large language model flows, is affected before version 3.1.0. The Chatflow configuration file upload settings can be modified to allow the application/javascript MIME type, letting an attacker upload .js files that the frontend does not normally permit. This allows persistent storage of malicious Node.js web shells on the server, potentially leading to Remote Code Execution (RCE).

Mitigation

Fixed in 3.1.0.

Details

Scores and exploitation

CVSS score: 7.1(high)
Patch available: Yes
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Attack vector: network
Attack complexity: low
Privileges required: low
User interaction: none
EPSS: 0.5%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 9, 2026.
Disclosure date: April 23, 2026

Weaknesses and techniques

Weakness (CWE): CWE-434
Attack pattern (CAPEC): CAPEC-1

Affected

Packages: flowise@<= 3.0.13 (fixed: 3.1.0)

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Plugin
Impact: Integrity,
Confidentiality,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-41269

First tracked: April 24, 2026 at 08:10 AM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 95% (self-assessed)

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

flowisenpmLLM dependency since 2024-03-12

Summary

Mitigation

Affected packages in the Exposure Registry

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