{"id":"CVE-2023-51701","aliases":["EUVD-2024-0427","GHSA-v2v2-hph8-q5xp"],"status":"published","title":"@fastify-reply-from JSON Content-Type parsing confusion","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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00479,"percentile":0.41791,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444"],"published":"2024-01-08T13:55:05Z","modified":"2026-10-28T02:31:00Z","fixes":[{"ecosystem":"npm","package":"@fastify/reply-from","fixed_in":["9.6.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@fastify/reply-from","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.6.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@fastify/reply-from","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.6.0"}]}]}],"products":[{"vendor":"fastify","product":"fastify-reply-from"},{"vendor":"fastify","product":"reply-from"}],"references":[{"url":"https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-v2v2-hph8-q5xp","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/fastify/fastify-reply-from/releases/tag/v9.6.0","tags":["x_refsource_MISC","x_transferred","Release Notes","web"]},{"url":"https://github.com/fastify/fastify-reply-from/commit/cbd7c17c09e6476268e34f5e499a6b923e8acc18","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-51701","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-v2v2-hph8-q5xp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/51xxx/CVE-2023-51701.json","tags":["advisory"]},{"url":"https://github.com/fastify/fastify-reply-from","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-51701","title":"@fastify-reply-from JSON Content-Type parsing confusion","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. \n","status":"published","published":"2024-01-08T13:55:05.071Z","modified":"2025-06-03T14:37:39.15Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:35:17.48054Z"}],"euvd":[{"id":"EUVD-2024-0427","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. \n","status":"published","published":"2024-01-08T13:55:05Z","modified":"2025-06-03T14:37:39Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T20:32:31.558173Z"}],"ghsa":[{"id":"GHSA-v2v2-hph8-q5xp","title":"@fastify/reply-from JSON Content-Type parsing confusion","description":"### Impact\n\nThe main repo of fastify use [fast-content-type-parse](https://github.com/fastify/fast-content-type-parse) to parse request Content-Type, which will [trim after split](https://github.com/fastify/fast-content-type-parse/blob/2776d054dd48e9ce40b8d5e5ff9b46fee82b95f1/index.js#L59).\n\nThe [fastify-reply-from](https://github.com/fastify/fastify-reply-from/blob/b79a22d6eb9a0b52cfbe8eb2cb22ad65f5a39e64/index.js#L118C14-L118C14) have not use this repo to unify the parse of Content-Type, which [won't trim](https://github.com/fastify/fastify-reply-from/blob/b79a22d6eb9a0b52cfbe8eb2cb22ad65f5a39e64/index.js#L118C14-L118C14).\n\nAs a result, 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.\n\n### Patches\n\n`@fastify/reply-from` v9.6.0 include the fix. \n\n### Workarounds\n\nThere are no known workarounds.\n\n### References\n\nHackerone Report: https://hackerone.com/reports/2295770.","status":"published","published":"2024-01-08T15:22:40Z","modified":"2024-01-08T16:47:58Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:37:30.183224Z"}],"nvd":[{"id":"CVE-2023-51701","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. \n","status":"published","published":"2024-01-08T14:15:46.677Z","modified":"2026-06-17T06:41:29.967Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:08:59.830468Z"}],"osv":[{"id":"CVE-2023-51701","title":"@fastify-reply-from JSON Content-Type parsing confusion","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. \n","status":"published","published":"2024-01-08T13:55:05.071Z","modified":"2026-10-28T02:31:00.018756509Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:44:35.245372Z"},{"id":"GHSA-v2v2-hph8-q5xp","title":"@fastify/reply-from JSON Content-Type parsing confusion","description":"### Impact\n\nThe main repo of fastify use [fast-content-type-parse](https://github.com/fastify/fast-content-type-parse) to parse request Content-Type, which will [trim after split](https://github.com/fastify/fast-content-type-parse/blob/2776d054dd48e9ce40b8d5e5ff9b46fee82b95f1/index.js#L59).\n\nThe [fastify-reply-from](https://github.com/fastify/fastify-reply-from/blob/b79a22d6eb9a0b52cfbe8eb2cb22ad65f5a39e64/index.js#L118C14-L118C14) have not use this repo to unify the parse of Content-Type, which [won't trim](https://github.com/fastify/fastify-reply-from/blob/b79a22d6eb9a0b52cfbe8eb2cb22ad65f5a39e64/index.js#L118C14-L118C14).\n\nAs a result, 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.\n\n### Patches\n\n`@fastify/reply-from` v9.6.0 include the fix. \n\n### Workarounds\n\nThere are no known workarounds.\n\n### References\n\nHackerone Report: https://hackerone.com/reports/2295770.","status":"published","published":"2024-01-08T15:22:40Z","modified":"2026-09-10T03:50:05.129781803Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:46:56.639206Z"}]}}