{"id":"CVE-2026-119049","kind":"vulnerability","aliases":["CVE-2026-119049"],"related":[],"title":"FreeMail: authenticated users can take over other users' mailboxes","description":"FreeMail before 5.3.2 contains an authorization bypass vulnerability that allows authenticated users to claim another user's existing mailbox via the POST /api/create endpoint. Attackers who know a victim's address can become co-owners through assignMailboxToUser to read messages and verification codes, set forwarding, and delete mail.","summary":"FreeMail before 5.3.2 lets any logged-in user claim an existing mailbox belonging to another user through the POST /api/create endpoint. The attacker can then read that person's mail and verification codes, set forwarding, and delete messages.","severity":"high","cvss":7.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["email","freemail","package","self-hosted"],"not_affected_if":["auth-required"],"how_to_check":"- Check the FreeMail version in use; affected if below `5.3.2`\n- Look for the `/api/create` endpoint and whether it accepts an existing mailbox address for a non-owner account","fix":"- FreeMail: upgrade to `5.3.2` or later","status":"open","published_at":"2026-10-29T14:17:51+00:00","first_seen_at":"2026-10-29T14:25:23+00:00","triaged_at":"2026-10-29T14:25:56+00:00","updated_at":"2026-10-29T14:25:56+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-29T14:25:56Z","model":"claude-haiku-5-5","output":{"fix":"- FreeMail: upgrade to `5.3.2` or later","reach":"network","title":"FreeMail: authenticated users can take over other users' mailboxes","impact":"high","summary":"FreeMail before 5.3.2 lets any logged-in user claim an existing mailbox belonging to another user through the POST /api/create endpoint. The attacker can then read that person's mail and verification codes, set forwarding, and delete messages.","audience":"businesses","category":"package","nicknames":[],"who_cares":["freemail","self-hosted","email"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"attacker reads victim's mail, codes, and deletes messages","analyst_note":"Confirm whether the sources' fix is a single version bump and whether any configuration workaround exists before 5.3.2; the NVD entry alone gives no check.","how_to_check":"- Check the FreeMail version in use; affected if below `5.3.2`\n- Look for the `/api/create` endpoint and whether it accepts an existing mailbox address for a non-owner account\n- unknown whether the sources give a further check","plain_action":"","needs_analyst":true,"not_affected_if":["auth-required"],"who_is_affected":"Any deployment of FreeMail before 5.3.2 where users can authenticate, since the flaw needs only a normal account plus knowledge of a victim's mailbox address. Deployments where registration and mailbox creation are restricted to administrators are less exposed, though the sources do not state this. Self-hosted mail instances are the main concern.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000702,"input_tokens":4135,"output_tokens":578,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-119049':12A,15A '-2026':11A,14A '/api/create':42B,83C '5.3.2':24B,63C 'address':91C 'allow':70C 'anoth':37B,75C 'assignmailboxtous':98C 'attack':45B,85C 'authent':2A,71C 'author':66C 'becom':93C 'belong':35B 'bypass':67C 'claim':31B,74C 'co':95C 'co-own':94C 'code':55B,104C 'contain':64C 'cve':10A,13A 'delet':59B,108C 'email':16B 'endpoint':43B,84C 'exist':33B,78C 'forward':57B,106C 'freemail':1A,17B,22B,61C 'host':21B 'know':87C 'let':25B 'log':28B 'logged-in':27B 'mail':52B,109C 'mailbox':9A,34B,79C 'messag':60B,101C 'owner':96C 'packag':18B 'person':50B 'post':41B,82C 'read':48B,100C 'self':20B 'self-host':19B 'set':56B,105C 'take':5A 'user':3A,8A,30B,38B,72C,76C 'verif':54B,103C 'via':80C 'victim':89C 'vulner':68C","nicknames":[],"mitigations":[],"who_affected":"Any deployment of FreeMail before 5.3.2 where users can authenticate, since the flaw needs only a normal account plus knowledge of a victim's mailbox address. Deployments where registration and mailbox creation are restricted to administrators are less exposed, though the sources do not state this. Self-hosted mail instances are the main concern.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"first_public_at":"2026-10-29T14:17:51+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/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-2026-119049","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119049","severity":null,"published_at":"2026-10-29T14:17:51+00:00","modified_at":"2026-10-29T14:17:51+00:00","first_seen_at":"2026-10-29T14:25:23+00:00","fetched_at":"2026-10-29T14:25:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}