{"id":"CVE-2026-75021","state":"PUBLISHED","title":"fastify-cli vulnerable to remote code execution via ignored explicit Inspector bind address","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.","publishedAt":"2026-09-08T12:50:23.633Z","updatedAt":"2026-09-08T14:21:11.520Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"openjs"},"assigner":"openjs","products":["fastify-cli fastify-cli"],"affected":[{"vendor":"fastify-cli","product":"fastify-cli","packageURL":"pkg:npm/fastify-cli","defaultStatus":"unaffected","versions":[{"version":"1.5.0","status":"affected","lessThan":"8.0.1","versionType":"semver"},{"version":"8.0.1","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/fastify/fastify-cli/security/advisories/GHSA-88v4-3ph7-r88m","https://cna.openjsf.org/security-advisories.html"],"weaknesses":["CWE-1327"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/75xxx/CVE-2026-75021.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75021","state":"PUBLISHED","datePublished":"2026-09-08T12:50:23.633Z","dateUpdated":"2026-09-08T14:21:11.520Z","assignerShortName":"openjs","assignerOrgId":"ce714d77-add3-4f53-aff5-83d477b104bb","dateReserved":"2026-08-17T13:48:54.386Z"},"containers":{"cna":{"title":"fastify-cli vulnerable to remote code execution via ignored explicit Inspector bind address","descriptions":[{"lang":"en","value":"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":[{"vendor":"fastify-cli","product":"fastify-cli","packageURL":"pkg:npm/fastify-cli","defaultStatus":"unaffected","versions":[{"version":"1.5.0","status":"affected","lessThan":"8.0.1","versionType":"semver"},{"version":"8.0.1","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/fastify/fastify-cli/security/advisories/GHSA-88v4-3ph7-r88m"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1327","lang":"en","description":"CWE-1327: Binding to an Unrestricted IP Address","type":"CWE"}]}],"providerMetadata":{"shortName":"openjs","orgId":"ce714d77-add3-4f53-aff5-83d477b104bb","dateUpdated":"2026-09-08T12:50:23.633Z"},"credits":[{"lang":"en","type":"reporter","value":"Universe-Theori"},{"lang":"en","type":"remediation developer","value":"mcollina"},{"lang":"en","type":"remediation reviewer","value":"UlisesGascon"}],"x_generator":{"engine":"cve-kit 1.0.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T14:21:00.762047Z","id":"CVE-2026-75021","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-08T14:21:11.520Z"}}]}}}