# CVE-2026-85736: Chartbrew: Arbitrary file deletion as root via data connection SSL/SSH paths

Status: published. Published: 2026-11-06. Updated: 2026-11-06.

Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. Prior to 5.2.3, connection creation or update stored attacker-chosen absolute SSL and SSH file paths, and later connection cleanup passed those stored paths to fs.unlink without a path restriction. The vulnerable surface is data-connection certificate and SSH-key cleanup when a connection is removed. A user with createOwn and deleteOwn permissions on their own team stores a target path in a connection and then deletes the connection to trigger cleanup; default self-signup grants teamOwner these permissions. The cleanup routine treats the stored SSL or SSH path as a managed certificate path and unlinks the referenced file; duplicateConnection provides a second advisory-identified trigger. The attacker must be able to create or update and then delete a connection on their own team. The default container runs Chartbrew as uid 0, while deployments with a less-privileged process are limited by that process's deletion permissions. The attacker can delete files such as /code/.env or application source, causing integrity loss and service disruption. This issue is fixed in version 5.2.3.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- chartbrew / chartbrew: < 5.2.3 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-73

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/chartbrew/chartbrew/security/advisories/GHSA-p5h6-f969-jpfv (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/chartbrew/chartbrew/commit/aa931cc868eff8c4343ae2263539fa2d0d4a0943 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-85736; retrieved 2026-11-06; source updated 2026-11-06

Revision: 5c53cb0281265e3e3314498f930f2d5c0c3cfb7d1e624fe01a0f2760ab76e44c

Canonical: https://y2.dev/cve/CVE-2026-85736

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