CVE-2026-40600Public exploitNetwork attack vector

Cross-project share-policy modification via unbound policy ID

Published Apr 30, 2026 · Updated Apr 30, 2026

Incorrect access control in Chartbrew 4.9.0 allows remote authenticated users to modify or delete another project's share policy. Project share-policy routes authorize the project ID in the URL, then update or delete the policy_id primary key without verifying project ownership. Access to any project with updateOwn permission and a victim policy ID is sufficient to weaken dashboard access controls or disrupt sharing.

CVSS severity8.1
High
EPSS probability0.23%
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 authenticated users to modify or delete another project's share policy. Project share-policy routes authorize the project ID in the URL, then update or delete the policy_id primary key without verifying project ownership. Access to any project with updateOwn permission and a victim policy ID is sufficient to weaken dashboard access controls or disrupt sharing.

The record

CVE
CVE-2026-40600
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Chartbrew
Product
Chartbrew
Classifications
CWE-639, T1565.001
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

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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 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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

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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