Auth bypass in Idinging Freemail
CVE-2026-119049
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/idinging/freemail/issues/73 (issue-tracking)
- github.com/idinging/freemail (product)
- github.com/idinging/freemail/commit/62ed3afdbb4de90a135c12de928e586caf01b5a1 (patch)
- github.com/idinging/freemail/releases/tag/v5.3.2 (release-notes)
- github.com/idinging/freemail/blob/a95c1710e7eeb9f2c74a49ef962f4f43a36695b3/src/… (technical-description)
- www.vulncheck.com/advisories/freemail-before-5.3.2-authorization-bypass-via-api… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119049?
- CVE-2026-119049 is a high-severity vulnerability in Idinging Freemail, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.6/10. Published 2026-10-29.
- How severe is CVE-2026-119049?
- High severity. CVSS v3 base score is 7.6 out of 10.