---
id: "CVE-2026-120429"
kind: "vulnerability"
aliases: ["CVE-2026-120429"]
title: "Camaleon CMS: low-privileged users can bypass media permissions and upload files"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["camaleon-cms", "package", "rails", "ruby"]
not_affected_if: ["no-authenticated-low-privilege-users", "version-2.9.2-or-later"]
published_at: "2026-11-02T15:17:24+00:00"
first_seen_at: "2026-11-02T15:24:01+00:00"
updated_at: "2026-11-02T15:26:03+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120429", "first_seen_at": "2026-11-02T15:24:01+00:00"}]
---

# Camaleon CMS: low-privileged users can bypass media permissions and upload files

Camaleon CMS before 2.9.2 has a missing authorization check in its admin media controller. A low-privileged logged-in user can upload files, read private media, and change other users' avatars.

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

## How to check

- Check the installed Camaleon CMS version in the Gemfile.lock or lockfile for `camaleon_cms`; versions below `2.9.2` are affected.
- Look for `Admin::MediaController` routes reachable at `/admin/media/upload` and `download_private_file` for non-admin roles.

## Fix

- Camaleon CMS: move to `2.9.2` or later.

## Timeline

- 2026-11-02T15:24:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120429

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/camaleon-cms-before-2.9.2-missing-authorization-via-admin-mediacontroller
- [fix] Patch: github.com https://github.com/owen2345/camaleon-cms/commit/7fe4fa0bf99256dfe32b5f674baf4f771606549e
- [fix] Release notes: github.com https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2

## From the sources

Camaleon CMS before 2.9.2 contains a missing authorization vulnerability in Admin::MediaController that allows low-privileged authenticated users to bypass the role-based Media permission. Attackers can POST to /admin/media/upload to store files, read private media via download_private_file, and use crop with saved_avatar to change other users' avatars.

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