{"id":"CVE-2026-120429","kind":"vulnerability","aliases":["CVE-2026-120429"],"related":[],"title":"Camaleon CMS: low-privileged users can bypass media permissions and upload files","description":"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.","summary":"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.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["camaleon-cms","package","rails","ruby"],"not_affected_if":["no-authenticated-low-privilege-users","version-2.9.2-or-later"],"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.\n- 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.","status":"open","published_at":"2026-11-02T15:17:24+00:00","first_seen_at":"2026-11-02T15:24:01+00:00","triaged_at":"2026-11-02T15:26:03+00:00","updated_at":"2026-11-02T15:26:03+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-02T15:26:03Z","model":"claude-haiku-5-5","output":{"fix":"- Camaleon CMS: move to `2.9.2` or later.","reach":"internet","title":"Camaleon CMS: low-privileged users can bypass media permissions and upload files","impact":"medium","summary":"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.","audience":"businesses","category":"package","nicknames":[],"who_cares":["camaleon-cms","ruby","rails"],"confidence":0.7,"fix_status":"available","needs_auth":"yes","worst_case":"low-privileged users read private files and alter other users' avatars","analyst_note":"","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.\n- Look for `Admin::MediaController` routes reachable at `/admin/media/upload` and `download_private_file` for non-admin roles.","plain_action":"","needs_analyst":false,"not_affected_if":["version-2.9.2-or-later","no-authenticated-low-privilege-users"],"who_is_affected":"Sites running Camaleon CMS before 2.9.2 where ordinary authenticated users have accounts. The flaw is in the admin media endpoints, so exposure depends on whether low-privileged roles can reach them. Sites without Camaleon CMS or already on 2.9.2 or later can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000696,"input_tokens":4191,"output_tokens":554,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-120429':16A,19A '-2026':15A,18A '/admin/media/upload':90C '2.9.2':29B,62C 'admin':37B,69C 'allow':72C 'attack':86C 'authent':76C 'author':33B,66C 'avatar':58B,106C,111C 'base':83C 'bypass':8A,79C 'camaleon':1A,21B,26B,59C 'camaleon-cm':20B 'chang':55B,108C 'check':34B 'cms':2A,22B,27B,60C 'contain':63C 'control':39B 'crop':103C 'cve':14A,17A 'download':98C 'file':13A,50B,93C,100C 'log':45B 'logged-in':44B 'low':4A,42B,74C 'low-privileg':3A,41B,73C 'media':9A,38B,53B,84C,96C 'mediacontrol':70C 'miss':32B,65C 'packag':23B 'permiss':10A,85C 'post':88C 'privat':52B,95C,99C 'privileg':5A,43B,75C 'rail':24B 'read':51B,94C 'role':82C 'role-bas':81C 'rubi':25B 'save':105C 'store':92C 'upload':12A,49B 'use':102C 'user':6A,47B,57B,77C,110C 'via':97C 'vulner':67C","nicknames":[],"mitigations":[],"who_affected":"Sites running Camaleon CMS before 2.9.2 where ordinary authenticated users have accounts. The flaw is in the admin media endpoints, so exposure depends on whether low-privileged roles can reach them. Sites without Camaleon CMS or already on 2.9.2 or later can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["camaleoncms","high","package","rails","ruby"],"first_public_at":"2026-11-02T15:17:24+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-120429","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120429","severity":null,"published_at":"2026-11-02T15:17:24+00:00","modified_at":"2026-11-02T15:17:24+00:00","first_seen_at":"2026-11-02T15:24:01+00:00","fetched_at":"2026-11-02T15:24:01+00:00","note":null}],"documents":[{"id":52447,"url":"https://github.com/owen2345/camaleon-cms/commit/7fe4fa0bf99256dfe32b5f674baf4f771606549e","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":52448,"url":"https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":52449,"url":"https://www.vulncheck.com/advisories/camaleon-cms-before-2.9.2-missing-authorization-via-admin-mediacontroller","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}