CVE-2026-41274Public exploitNetwork attack vector

Neo4j data compromise via unsanitized chain input

Published Apr 23, 2026 · Updated Apr 23, 2026

Cypher injection in Flowise before 3.1.0 allows remote attackers to read, modify, or delete data through a vulnerable chatflow. The GraphCypherQAChain run method places the submitted question in a query object and invokes the chain without neutralizing Cypher syntax. Exploitation requires prediction-endpoint access, a chatflow using the affected node, and a connected Neo4j database with valid credentials.

CVSS severity9.3
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cypher injection in Flowise before 3.1.0 allows remote attackers to read, modify, or delete data through a vulnerable chatflow. The GraphCypherQAChain run method places the submitted question in a query object and invokes the chain without neutralizing Cypher syntax. Exploitation requires prediction-endpoint access, a chatflow using the affected node, and a connected Neo4j database with valid credentials.

The record

CVE
CVE-2026-41274
Published
Apr 23, 2026
Updated
Apr 23, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-943, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=< 3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FlowiseAI · Flowiseversion=< 3.1.0
FlowiseAI · flowise-componentsversion=< 3.1.0

Published CVSS scores

9.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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-943Improper Neutralization of Special Elements in Data Query Logic
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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