High 7.5Published Jun 30, 2023

CVE-2023-30589The llhttp parser in the http module in Node v20.2.0 does not strictly use the CRLF sequence to delimit HTTP requests.

Updated under an hour ago (Oct 27, 2026, 8:50 PM ET)

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It affects NodeJS Node and 2 other products. Add what you run to find out whether that includes you.

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Exploited in the last 30 days

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). The 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: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: hackerone
NVD analysis: Modified
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

NodeJS Node nodejs:node (from the name)	from 4.0 before 4.; from 5.0 before 5.; from 6.0 before 6.; from 7.0 before 7.; from 8.0 before 8.; from 9.0 before 9.; from 10.0 before 10.; from 11.0 before 11.; and 9 more ranges	CNA record
nodejs node.js nodejs:node.js	from 16.0.0 before 16.20.1; from 18.0.0 before 18.16.1; from 20.0.0 before 20.3.1	NVD
fedoraproject fedora fedoraproject:fedora	37; 38	NVD

References

References

https://hackerone.com/reports/2001873
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VEEQIN5242K5NBE2CZ4DYTNA5B4YTYE5/
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/VKFMKD4MJZIKFQJAAJ4VZ2FHIJ764A76/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HMEELCREWMRT6NS7HWXLA6XFLLMO36HE/
https://security.netapp.com/advisory/ntap-20230803-0009/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCVG4TQRGTK4LKAZKVEQAUEJM7DUACYE/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IV326O2X4BE3SINX5FJHMAKVHUAA4ZYF/
https://security.netapp.com/advisory/ntap-20240621-0006/

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.