CVE-2026-121729— emailflare before commit cf31f33 Missing Authorization via /api/keys Routes

Quick assessment

Affected

0xdps emailflare

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在提交 cf31f33 之前，emailflare 的收件箱服务路由存在缺少授权校验的漏洞。该漏洞允许任何已认证成员列出、创建和撤销 API 密钥。攻击者可以生成一个全局有效的实时 API 密钥，该密钥可被接口接受，从而从任意域名发送邮件；或者撤销现有密钥，导致相关集成失效。

CVSS 8.3 · High Updated Nov 04, 2026

Possible ATT&CK Techniques 2 AI

T1078 · Valid Accounts T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

emailflare before commit cf31f33 Missing Authorization via /api/keys Routes

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

授权机制缺失

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
0xdps	emailflare	0 ~ cf31f33bbb4a324d5353b8a5db0312fedc19618f	-

II. Public POCs for CVE-2026-121729

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-121729

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Other References for CVE-2026-121729 (4)

https://github.com/0xdps/emailflare product
https://github.com/0xdps/emailflare/blob/d448ea205937a5e82683f89013d4c23159da5b7d/services/inbox-worker/src/routes/keys.ts technical-description
https://github.com/0xdps/emailflare/commit/cf31f33bbb4a324d5353b8a5db0312fedc19618f patch
https://www.vulncheck.com/advisories/emailflare-before-commit-cf31f33-missing-authorization-via-api-keys-routes third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121729

IV. Related Vulnerabilities

Same product: emailflare

CVE-2026-121730
emailflare before commit cf31f33 Missing Authorization via I

Same vendor: 0xdps

CVE-2026-121730
emailflare before commit cf31f33 Missing Authorization via I

Same weakness: CWE-862