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CVE-2026-75021— fastify-cli vulnerable to remote code execution via ignored explicit Inspector bind address

Quick assessment

Affected
fastify-cli fastify-cli
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.

fastify-cli是Fastify团队开源的一款协助创建与管理Web服务项目的命令行工具。 fastify-cli 1.5.0至8.0.1之前版本存在配置错误漏洞，该漏洞源于使用调试标志启动Node.js Inspector时忽略用户提供的显式绑定地址，将Inspector绑定到广泛可达地址，可能导致调试接口暴露，远程攻击者能够执行任意代码。

CVSS 8.1 · High EPSS 0.42% · P35

Possible ATT&CK Techniques 1 AI

T1527

Affected Version Matrix 2

VendorProduct Version RangeStatus
fastify-cli fastify-cli 1.5.0< 8.0.1 affected
8.0.1 unaffected
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I. Basic Information for CVE-2026-75021

Vulnerability Information
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Vulnerability Title
fastify-cli vulnerable to remote code execution via ignored explicit Inspector bind address
Source: CVE Program / CVE List V5
Vulnerability Description
fastify-cli starts the Node.js Inspector when a debug flag is used, but it ignores the explicit bind address the user supplies and binds the Inspector to a broadly reachable address instead of the intended loopback. As a result the debugging interface can be exposed beyond the local machine, and because the Inspector protocol allows arbitrary code evaluation, a remote party that reaches it can achieve remote code execution on the developer's machine. This affects fastify-cli from 1.5.0 up to 8.0.1. Users should upgrade to fastify-cli 8.0.1, which honors the configured Inspector bind address.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1327
Source: CVE Program / CVE List V5
Vulnerability Title
fastify-cli 配置错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fastify-cli是Fastify团队开源的一款协助创建与管理Web服务项目的命令行工具。 fastify-cli 1.5.0至8.0.1之前版本存在配置错误漏洞，该漏洞源于使用调试标志启动Node.js Inspector时忽略用户提供的显式绑定地址，将Inspector绑定到广泛可达地址，可能导致调试接口暴露，远程攻击者能够执行任意代码。
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
fastify-cli fastify-cli 1.5.0 ~ 8.0.1 -

II. Public POCs for CVE-2026-75021

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III. Intelligence Information for CVE-2026-75021

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Vendor Advisories for CVE-2026-75021 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1327

V. Comments for CVE-2026-75021

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