# CVE-2026-40595: Chartbrew: Incorrect Access Control in public chart and export routes via missing onReport and SharePolicy checks

> Unauthenticated attackers can read or export hidden chart data in Chartbrew by bypassing report and share policy checks.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Apr 2026
- **Updated:** 30 Apr 2026
- **Also known as:** GHSA-mq7q-6xh6-5649

## What is CVE-2026-40595?

CVE-2026-40595 is a high-severity missing authorization vulnerability in chartbrew, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. In version 4.9.0, Chartbrew exposes public chart retrieval and export routes that only verify project-level public access and, for exports, a team-level export toggle. The routes do not verify whether the target chart is actually allowed on the public report or whether the governing SharePolicy permits public access. An unauthenticated attacker who knows a chart identifier in a public project can read or export chart data for charts that were intentionally hidden from the report. This issue has been patched in version 5.0.0.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-40595?


## How do I fix CVE-2026-40595?

No fix has been published for CVE-2026-40595 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-40595 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40595 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40595 and fix it if it is affected.

What it is: CVE-2026-40595 is a high-severity missing authorization vulnerability in chartbrew, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40595 exists.

Affected product: chartbrew. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-40595/ (Markdown: https://insights.sbomify.com/CVE-2026-40595/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40595
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40595
- OSV: https://osv.dev/vulnerability/CVE-2026-40595

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40595/
Summaries are generated and may contain mistakes; the official description above is the record.