CVE-2025-59434Public exploitNetwork attack vector

Cross-tenant secret disclosure via shared $vars context

Published Sep 22, 2025 · Updated Sep 22, 2025

Information disclosure in Flowise Cloud before August 2025 allows remote authenticated users to read other tenants' environment variables. The POST /api/v1/node-custom-function endpoint injects a platform-wide $vars object into the Custom JavaScript Function context instead of limiting it to the caller's workspace. A free-tier account is sufficient to retrieve cross-tenant API keys, cloud credentials, database URIs, passwords, and tokens.

CVSS severity9.6
Critical
EPSS probability3.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Flowise Cloud before August 2025 allows remote authenticated users to read other tenants' environment variables. The POST /api/v1/node-custom-function endpoint injects a platform-wide $vars object into the Custom JavaScript Function context instead of limiting it to the caller's workspace. A free-tier account is sufficient to retrieve cross-tenant API keys, cloud credentials, database URIs, passwords, and tokens.

The record

CVE
CVE-2025-59434
Published
Sep 22, 2025
Updated
Sep 22, 2025
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-284, CWE-200, T1552
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2025Record 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=< cloud-hosted (as of Aug 2025)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FlowiseAI · Flowiseversion=< cloud-hosted (as of Aug 2025)

Published CVSS scores

9.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552Unsecured Credentials

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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