{"cve":"CVE-2023-23936","nvd":{"published":"2023-02-16T18:15:10.877","modified":"2026-06-17T05:38:19.600","status":"Modified","description":"Undici is an HTTP/1.1 client for Node.js. Starting with version 2.0.0 and prior to version 5.19.1, the undici library does not protect `host` HTTP header from CRLF injection vulnerabilities. This issue is patched in Undici v5.19.1. As a workaround, sanitize the `headers.host` string before passing to undici.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-74","CWE-93"],"references":["https://github.com/nodejs/undici/commit/a2eff05401358f6595138df963837c24348f2034","https://github.com/nodejs/undici/releases/tag/v5.19.1","https://github.com/nodejs/undici/security/advisories/GHSA-5r9g-qh6m-jxff","https://hackerone.com/reports/1820955","https://github.com/nodejs/undici/commit/a2eff05401358f6595138df963837c24348f2034"],"products":["nodejs:node.js","nodejs:undici"],"source":"nvd","synced_at":"2026-10-19T21:37:38.595364862+00:00"},"epss":{"cve":"CVE-2023-23936","score":0.01129,"percentile":0.66392,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5r9g-qh6m-jxff","url":"https://osv.dev/vulnerability/GHSA-5r9g-qh6m-jxff","summary":"CRLF Injection in Nodejs ‘undici’ via host","modified":"2026-09-10T03:49:51.840716639Z","packages":[{"ecosystem":"npm","name":"undici","purl":"pkg:npm/undici","ranges":[">=2.0.0 <5.19.1"],"fixed":["5.19.1"]}]}],"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."]}