CVE-2026-40595Public exploitNetwork attack vector

Unauthenticated hidden-chart disclosure via missing policy checks

Published Apr 30, 2026 · Updated Apr 30, 2026

Incorrect access control in Chartbrew 4.9.0 allows remote attackers to read hidden chart data through public retrieval and export routes. In server/api/ChartRoute.js, the handlers return chart data after checking project publicity but omit chart.onReport and SharePolicy.visibility checks. The chart identifier must be known, the project must be public, and password-protected projects require the report password; exports also require allowReportExport.

CVSS severity7.5
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect access control in Chartbrew 4.9.0 allows remote attackers to read hidden chart data through public retrieval and export routes. In server/api/ChartRoute.js, the handlers return chart data after checking project publicity but omit chart.onReport and SharePolicy.visibility checks. The chart identifier must be known, the project must be public, and password-protected projects require the report password; exports also require allowReportExport.

The record

CVE
CVE-2026-40595
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Chartbrew
Product
Chartbrew
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

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

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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== 4.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Chartbrew · Chartbrewversion== 4.9.0

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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

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Your stack

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