{"cve":"CVE-2023-51701","nvd":{"published":"2024-01-08T14:15:46.677","modified":"2026-06-17T06:41:29.967","status":"Modified","description":"fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. A reverse proxy server built with `@fastify/reply-from` could misinterpret the incoming body by passing an header `ContentType: application/json ; charset=utf-8`. This can lead to bypass of security checks. This vulnerability has been patched in '@fastify/reply-from` version 9.6.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-444"],"references":["https://github.com/fastify/fastify-reply-from/releases/tag/v9.6.0","https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-v2v2-hph8-q5xp","https://github.com/fastify/fastify-reply-from/releases/tag/v9.6.0","https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-v2v2-hph8-q5xp"],"products":["fastify:reply-from"],"source":"nvd","synced_at":"2026-10-19T21:43:38.875533635+00:00"},"epss":{"cve":"CVE-2023-51701","score":0.00479,"percentile":0.41342,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v2v2-hph8-q5xp","url":"https://osv.dev/vulnerability/GHSA-v2v2-hph8-q5xp","summary":"@fastify/reply-from JSON Content-Type parsing confusion","modified":"2026-09-10T03:50:05.129781803Z","packages":[{"ecosystem":"npm","name":"@fastify/reply-from","purl":"pkg:npm/%40fastify/reply-from","ranges":["<9.6.0"],"fixed":["9.6.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}