CVE-2026-40601Public exploitNetwork attack vector

Private chart data disclosure via refresh endpoint

Published Apr 30, 2026 · Updated Apr 30, 2026

Missing authorization in Chartbrew 4.9.0 allows remote attackers to read private chart data through an unauthenticated refresh request. POST /api/chart/:chart_id/query authorizes solely on the owning team's allowReportRefresh flag and skips public-report, project-visibility, and share-policy checks. Exploitation requires a valid chart identifier and an enabled team refresh flag; the response exposes refreshed chart data and protected backend query results.

CVSS severity7.5
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Chartbrew 4.9.0 allows remote attackers to read private chart data through an unauthenticated refresh request. POST /api/chart/:chart_id/query authorizes solely on the owning team's allowReportRefresh flag and skips public-report, project-visibility, and share-policy checks. Exploitation requires a valid chart identifier and an enabled team refresh flag; the response exposes refreshed chart data and protected backend query results.

The record

CVE
CVE-2026-40601
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Chartbrew
Product
Chartbrew
Classifications
CWE-862, 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-862Missing Authorization
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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