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CVE-2023-23936
CRLF Injection in Nodejs ‘undici’ via host
Medium6.5EPSS 1.1%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.1% · top 33% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
References (4)
- https://github.com/nodejs/undici/security/advisories/GHSA-5r9g-qh6m-jxff (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/nodejs/undici/commit/a2eff05401358f6595138df963837c24348f2034 (opens in a new tab)x_refsource_MISCx_transferred
- https://hackerone.com/reports/1820955 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nodejs/undici/releases/tag/v5.19.1 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-5r9g-qh6m-jxff (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-23936)Record last updated .