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8.4

FreeMail before 5.3.2 lets users take over another’s mailbox

CVE-2026-119049 · published 6 days ago
Summary

In versions of FreeMail earlier than 5.3.2, a logged‑in user can trick the system into assigning an existing mailbox to themselves. This lets the attacker read the victim’s emails, capture verification codes, forward messages, or delete the mailbox. Upgrade FreeMail to version 5.3.2 or later, or apply the vendor’s recommended patch, to close the gap.

What to do
  • Update idinging freemail to version 5.3.2 or later.
Affected software
VendorProductAffected versions
idinging freemail < 5.3.2
Original advisory text
FreeMail before 5.3.2 Authorization Bypass via /api/create Mailbox Claiming
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
8.4 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-639Authorization Bypass Through User-Controlled Key
Timeline
Published29 Oct 2026
Updated4 Nov 2026
First seen29 Oct 2026
Sources
CVE-2026-119049 · NVD
CVE-2026-119049 · MITRE
CVE-2026-119049 · OSV
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