CVE-2026-40904Public exploitNetwork attack vector

Cross-project data access via team-scoped authorization

Published Apr 30, 2026 · Updated Apr 30, 2026

Improper access control in Chartbrew 4.9.0 allows remote authenticated users to access other projects' datasets within the same team. Dataset and dataRequest routes verify access to some same-team resource but fail to bind the requested resource and connection to the caller's allowed projects. Any project-scoped role with one accessible dataset can cross project boundaries to read data or alter and execute requests through victim-owned connections.

CVSS severity8.1
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper access control in Chartbrew 4.9.0 allows remote authenticated users to access other projects' datasets within the same team. Dataset and dataRequest routes verify access to some same-team resource but fail to bind the requested resource and connection to the caller's allowed projects. Any project-scoped role with one accessible dataset can cross project boundaries to read data or alter and execute requests through victim-owned connections.

The record

CVE
CVE-2026-40904
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Chartbrew
Product
Chartbrew
Classifications
CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion== 4.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chartbrew · Chartbrewversion== 4.9.0

Published CVSS scores

8.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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.

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-284Improper Access Control
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo