---
id: "CVE-2026-85736"
page: "https://infrastack.ai/live/CVE-2026-85736"
kind: "vulnerability"
aliases: ["CVE-2026-85736"]
title: "Chartbrew: connection cleanup lets a team user delete arbitrary server files"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["chartbrew", "docker", "node", "package", "self-hosted"]
not_affected_if: ["managed-hosting", "restricted-file-permissions", "version-5.2.3-or-later"]
published_at: "2026-11-06T21:17:11+00:00"
first_seen_at: "2026-11-06T21:45:08+00:00"
updated_at: "2026-11-06T21:46:34+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85736", "first_seen_at": "2026-11-06T21:45:08+00:00"}]
exploit_sources: []
---

# Chartbrew: connection cleanup lets a team user delete arbitrary server files

Link for people: https://infrastack.ai/live/CVE-2026-85736 (this .md is for agents)

Chartbrew stored attacker-chosen SSL and SSH file paths on data connections and later passed them to fs.unlink when a connection was removed. A user with create and delete rights on their own team can delete arbitrary files on the server, such as the .env file or application source.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Chartbrew version; affected versions are those before `5.2.3`.
- Check whether the Chartbrew process runs as root (the default container runs as uid 0).
- Check whether self-signup is enabled, since it grants teamOwner permissions by default.

## Fix

- Upgrade Chartbrew to `5.2.3`.

## Timeline

- 2026-11-06T21:45:08+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-85736

## Documents

- [advisory] Vendor advisory: github.com https://github.com/chartbrew/chartbrew/security/advisories/GHSA-p5h6-f969-jpfv
- [fix] Patch: github.com https://github.com/chartbrew/chartbrew/commit/aa931cc868eff8c4343ae2263539fa2d0d4a0943
- [fix] Release notes: github.com https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3

## From the sources

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.

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