CVE-2025-71338Public exploitNetwork attack vector

Remote code execution via traversal-based file overwrite

Published Jun 25, 2026 · Updated Jun 25, 2026

Path traversal in Flowise through 3.1.3 allows remote attackers to write arbitrary files through the document-store loader API. The addBase64FilesToStorage, addArrayFilesToStorage, and addSingleFileToStorage functions pass an untrusted fileName to path.join without validation, allowing ../ segments to escape the storage directory. No authentication or user interaction is required; code runs with the server's privileges after a crafted package.json is written and the application restarts.

CVSS severity10.0
Critical
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Flowise through 3.1.3 allows remote attackers to write arbitrary files through the document-store loader API. The addBase64FilesToStorage, addArrayFilesToStorage, and addSingleFileToStorage functions pass an untrusted fileName to path.join without validation, allowing ../ segments to escape the storage directory. No authentication or user interaction is required; code runs with the server's privileges after a crafted package.json is written and the application restarts.

The record

CVE
CVE-2025-71338
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-94, CWE-73, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FlowiseAI · Flowiseversion=0

Published CVSS scores

10.0FlowiseAICVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code
CWE-73External Control of File Name or Path
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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