{"id":"CVE-2023-23936","aliases":["BIT-node-2023-23936","BIT-node-min-2023-23936","GHSA-5r9g-qh6m-jxff"],"url":"https://o3.security/vulnerability/CVE-2023-23936","summary":"CRLF Injection in Nodejs ‘undici’ via host","details":"### Impact\n\nundici library does not protect `host` HTTP header from CRLF injection vulnerabilities.\n\n### Patches\n\nThis issue was patched in Undici v5.19.1.\n\n### Workarounds\n\nSanitize the `headers.host` string before passing to undici.\n\n### References\n\nReported at https://hackerone.com/reports/1820955.\n\n### Credits\n\nThank you to Zhipeng Zhang ([@timon8](https://hackerone.com/timon8)) for reporting this vulnerability. ","published":"2023-02-16T17:30:23.968Z","modified":"2026-10-28T02:30:59.649189973Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"undici","fixedVersion":"5.19.1"}],"fix":{"url":"https://github.com/nodejs/undici/commit/a2eff05401358f6595138df963837c24348f2034","label":"nodejs/undici@a2eff05"},"references":[{"type":"WEB","url":"https://github.com/nodejs/undici/releases/tag/v5.19.1"},{"type":"WEB","url":"https://hackerone.com/reports/1820955"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23936.json"},{"type":"ADVISORY","url":"https://github.com/nodejs/undici/security/advisories/GHSA-5r9g-qh6m-jxff"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23936"},{"type":"FIX","url":"https://github.com/nodejs/undici/commit/a2eff05401358f6595138df963837c24348f2034"},{"type":"PACKAGE","url":"https://github.com/nodejs/undici"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:59.649189973Z"}}