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OpenAdvisories
High · 8.1 CVE-2026-75021 EUVD-2026-72734

fastify-cli vulnerable to remote code execution via ignored explicit Inspector bind address

Published Sep 8, 2026 · Updated Sep 8, 2026 · Assigned by openjs

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.

Affected products

VendorProductAffectedFixed
fastify-cli fastify-cli 1.5.0 – < 8.0.1 8.0.1

References