---
id: "CVE-2026-121729"
kind: "vulnerability"
aliases: ["CVE-2026-121729"]
title: "emailflare: any member can mint or revoke API keys"
severity: "high"
cvss: 8.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["email-api", "emailflare", "package", "self-hosted"]
not_affected_if: ["commit-cf31f33-or-later", "single-user-deployment"]
published_at: "2026-11-03T23:17:36+00:00"
first_seen_at: "2026-11-03T23:45:14+00:00"
updated_at: "2026-11-03T23:45:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121729", "first_seen_at": "2026-11-03T23:45:14+00:00"}]
---

# emailflare: any member can mint or revoke API keys

Emailflare's inbox service lets any signed-in member list, create and revoke API keys on its /api/keys routes without the right permission. An attacker can create a global live key that sends mail from any domain, or revoke existing keys to break integrations.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the deployed emailflare build predates commit `cf31f33`
- Review who holds an account on the inbox service and whether `/api/keys` is reachable by ordinary members

## Fix

- Move to a build at or after commit `cf31f33` (the patch linked in the sources)

## Timeline

- 2026-11-03T23:45:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121729

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/emailflare-before-commit-cf31f33-missing-authorization-via-api-keys-routes
- [fix] Patch: github.com https://github.com/0xdps/emailflare/commit/cf31f33bbb4a324d5353b8a5db0312fedc19618f

## From the sources

emailflare before commit cf31f33 contains a missing authorization vulnerability in the inbox service /api/keys routes that allows any authenticated member to list, create and revoke API keys. Attackers can mint a global live API key accepted by /v1/send to send mail from any domain, or revoke existing keys to disable integrations.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_