{"cve":"CVE-2023-30589","nvd":{"published":"2023-07-01T00:15:10.293","modified":"2026-10-08T22:17:24.087","status":"Modified","description":"The llhttp parser in the http module in Node v20.2.0 does not strictly use the CRLF sequence to delimit HTTP requests. This can lead to HTTP Request Smuggling (HRS).\r\n\r\nThe CR character (without LF) is sufficient to delimit HTTP header fields in the llhttp parser. According to RFC7230 section 3, only the CRLF sequence should delimit each header-field. This impacts all Node.js active versions: v16, v18, and, v20","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":[],"references":["https://hackerone.com/reports/2001873","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HMEELCREWMRT6NS7HWXLA6XFLLMO36HE/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IV326O2X4BE3SINX5FJHMAKVHUAA4ZYF/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEJWL67XR67JAGEL2ZK22NA3BRKNMZNY/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCVG4TQRGTK4LKAZKVEQAUEJM7DUACYE/"],"products":["fedoraproject:fedora","nodejs:node.js"],"source":"nvd","synced_at":"2026-10-19T21:38:30.124994567+00:00"},"epss":{"cve":"CVE-2023-30589","score":0.03906,"percentile":0.90207,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-cggh-pq45-6h9x","url":"https://osv.dev/vulnerability/GHSA-cggh-pq45-6h9x","summary":"llhttp vulnerable to HTTP request smuggling","modified":"2026-09-10T03:49:57.269146869Z","packages":[{"ecosystem":"npm","name":"llhttp","purl":"pkg:npm/llhttp","ranges":["<8.1.1"],"fixed":["8.1.1"]}]}],"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."]}