CVE-2026-42156Public exploitNetwork attack vector

Graph-data disclosure via node-type Cypher injection

Published May 12, 2026 · Updated May 12, 2026

Cypher injection in Reconurge Flowsint before 1.2.3 allows remote authenticated users to read all Neo4j graph data through node creation. The add_node route in flowsint-api/app/api/routes/sketches.py interpolates the untrusted data.type value into a backtick-delimited MERGE label and executes the resulting query through neo4j_connection. Any registered user who can update a sketch can escape that label, run arbitrary Cypher, and reconstruct nodes and relationships from every investigation.

CVSS severity7.1
High
EPSS probability0.29%
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 Reconurge Flowsint before 1.2.3 allows remote authenticated users to read all Neo4j graph data through node creation. The add_node route in flowsint-api/app/api/routes/sketches.py interpolates the untrusted data.type value into a backtick-delimited MERGE label and executes the resulting query through neo4j_connection. Any registered user who can update a sketch can escape that label, run arbitrary Cypher, and reconstruct nodes and relationships from every investigation.

The record

CVE
CVE-2026-42156
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Reconurge
Product
Flowsint
Classifications
CWE-943, T1213, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=< 1.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Reconurge · Flowsintversion=< 1.2.3

Published CVSS scores

7.1GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-943Improper Neutralization of Special Elements in Data Query Logic
T1213Data from Information Repositories
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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