Read the docs
TI-2023-14414 Aliases CVE-2023-30589GHSA-cggh-pq45-6h9x

The llhttp parser in the http module in Node v20.2.0 does not strictly use the CRLF…

Priority MEDIUM 45Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 4 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03906 90th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Node (NodeJS): 16.20.1, 18.16.1, 20.3.1llhttp (npm): 8.1.1Red Hat: 6 advisoriesRed Hat: 4 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NodeJSNode4.0 and later; 5.0 and later; 6.0 and later; 7.0 and later; 8.0 and later; 9.0 and later; 10.0 and later; 11.0 and later; 12.0 and later; 13.0 and later; 14.0 and later; 15.0 and later; 16.0 to before 16.20.1; 17.0 and later; 18.0 to before 18.16.1; 19.0 and later; 20.0 to before 20.3.116.20.1, 18.16.1, 20.3.1Patch availableCNA
—llhttp (npm)before 8.1.18.1.1Patch availableGHSA-cggh-pq45-6h9x
  • Node VendorNodeJS Affected 4.0 and later; 5.0 and later; 6.0 and later; 7.0 and later; 8.0 and later; 9.0 and later; 10.0 and later; 11.0 and later; 12.0 and later; 13.0 and later; 14.0 and later; 15.0 and later; 16.0 to before 16.20.1; 17.0 and later; 18.0 to before 18.16.1; 19.0 and later; 20.0 to before 20.3.1 Fixed in 16.20.1, 18.16.1, 20.3.1 Patch available CNA
  • llhttp (npm) Vendor— Affected before 8.1.1 Fixed in 8.1.1 Patch available GHSA-cggh-pq45-6h9x

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*16.0.0 to before 16.20.1; 18.0.0 to before 18.16.1; 20.0.0 to before 20.3.1VulnerableNodeJS
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*38VulnerableFedoraproject
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 16.0.0 to before 16.20.1; 18.0.0 to before 18.16.1; 20.0.0 to before 20.3.1 Vulnerable ·NodeJS
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject

Remediation

  • Fix · CNA Node (NodeJS) Fixed in 16.20.1, 18.16.1, 20.3.1
  • Fix · GHSA-cggh-pq45-6h9x llhttp (npm) Fixed in 8.1.1 Advisory →

Red Hat 6 advisories

  • RHSA-2023:5533 Released 2023-10-09 · Red Hat rating Important
    nodejs security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) nodejs-1:16.20.2-1.el9_0, nodejs-docs-1:16.20.2-1.el9_0, nodejs-full-i18n-1:16.20.2-1.el9_0 +2
  • RHSA-2023:5361 Released 2023-09-26 · Red Hat rating Important
    nodejs:16 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) nodejs-1:16.20.2-2.module+el8.6.0+19897+9590a839.aarch64::nodejs:16, nodejs-1:16.20.2-2.module+el8.6.0+19897+9590a839.ppc64le::nodejs:16, nodejs-1:16.20.2-2.module+el8.6.0+19897+9590a839.s390x::nodejs:16 +19
  • RHSA-2023:4537 Released 2023-08-08 · Red Hat rating Moderate
    nodejs:16 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:16.20.1-1.module+el8.8.0+19440+ee8dbee5.aarch64::nodejs:16, nodejs-1:16.20.1-1.module+el8.8.0+19440+ee8dbee5.ppc64le::nodejs:16, nodejs-1:16.20.1-1.module+el8.8.0+19440+ee8dbee5.s390x::nodejs:16 +19
Show 3 more Red Hat advisories
  • RHSA-2023:4536 Released 2023-08-08 · Red Hat rating Moderate
    nodejs:18 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:18.16.1-1.module+el8.8.0+19438+94e84959.aarch64::nodejs:18, nodejs-1:18.16.1-1.module+el8.8.0+19438+94e84959.ppc64le::nodejs:18, nodejs-1:18.16.1-1.module+el8.8.0+19438+94e84959.s390x::nodejs:18 +20
  • RHSA-2023:4330 Released 2023-07-31 · Red Hat rating Moderate
    nodejs:18 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) nodejs-1:18.16.1-1.module+el9.2.0.z+19424+78951f07.aarch64::nodejs:18, nodejs-1:18.16.1-1.module+el9.2.0.z+19424+78951f07.ppc64le::nodejs:18, nodejs-1:18.16.1-1.module+el9.2.0.z+19424+78951f07.s390x::nodejs:18 +20
  • RHSA-2023:4331 Released 2023-07-31 · Red Hat rating Moderate
    nodejs security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) nodejs-1:16.20.1-1.el9_2, nodejs-docs-1:16.20.1-1.el9_2, nodejs-full-i18n-1:16.20.1-1.el9_2 +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix planned: Will not fix
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:4536, RHSA-2023:4537
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:4330, RHSA-2023:4331
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2023:5361
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:5533

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-30589
  2. 2026-10-03 Alias added: GHSA-cggh-pq45-6h9x
  3. 2026-10-07 EPSS moved to the 90th–95th percentile
  4. 2026-10-08 CISA SSVC decision points changed
  5. 2026-10-09 Priority changed: LOW → MEDIUM

References

Exploit 1

Patch 2

Advisory 2

Other 16

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2016-01993 The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other… CVSS 3.1HIGH 7.5
  • TI-2024-03325 Command injection vulnerability in programing languages on Microsoft Windows operating system. CVSS 3.1CRITICAL 9.8
  • TI-2022-03472 X.509 Email Address Variable Length Buffer Overflow CVSS 3.1HIGH 7.5
  • TI-2022-03315 X.509 Email Address 4-byte Buffer Overflow CVSS 3.1HIGH 7.5
See all 186 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences