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CVE-2026-59721— Hoppscotch: Admin RCE via MAILER_SMTP_URL nodemailer sendmail-transport injection

Quick assessment

Affected
hoppscotch hoppscotch
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hoppscotch是Hoppscotch组织开源的一个Api开发生态系统。 Hoppscotch 2026.6.0之前版本存在安全漏洞，该漏洞源于对MAILER_SMTP_URL值以及路径、查询或片段内容的验证不当，允许管理员在后端容器重启并发送邮件后以root身份执行任意命令。

CVSS 7.2 · High EPSS 1.01% · P62

Affected Version Matrix 1

VendorProduct Version RangeStatus
hoppscotch hoppscotch < 2026.6.0 affected
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I. Basic Information for CVE-2026-59721

Vulnerability Information
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Vulnerability Title
Hoppscotch: Admin RCE via MAILER_SMTP_URL nodemailer sendmail-transport injection
Source: CVE Program / CVE List V5
Vulnerability Description
Hoppscotch is an open source API development ecosystem. Prior to 2026.6.0, the updateInfraConfigs GraphQL mutation in admin/infra.resolver.ts accepts an attacker-controlled MAILER_SMTP_URL value, and validateSMTPUrl in utils.ts permits path, query, or fragment content that nodemailer parses into sendmail transport options, allowing an admin to execute arbitrary commands as root in the backend container after restart and mail sending. This issue is fixed in version 2026.6.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Hoppscotch 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hoppscotch是Hoppscotch组织开源的一个Api开发生态系统。 Hoppscotch 2026.6.0之前版本存在安全漏洞，该漏洞源于对MAILER_SMTP_URL值以及路径、查询或片段内容的验证不当，允许管理员在后端容器重启并发送邮件后以root身份执行任意命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hoppscotch hoppscotch < 2026.6.0 -

II. Public POCs for CVE-2026-59721

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5509 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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III. Intelligence Information for CVE-2026-59721

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Patches & Fixes for CVE-2026-59721 (2)

Vendor Advisories for CVE-2026-59721 (1)

Other References for CVE-2026-59721 (1)

IV. Related Vulnerabilities

Same product: hoppscotch
Same vendor: hoppscotch
Same weakness: CWE-77

V. Comments for CVE-2026-59721

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