Vulnerability-Lookup

GHSA-HCHW-QWX7-4W4C

Vulnerability from github – Published: 2025-05-19 03:30 – Updated: 2025-05-19 03:30

Details

A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using \r\n\rX instead of the required \r\n\r\n. This inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests.

The issue was resolved by upgrading llhttp to version 9, which enforces correct header termination.

Impact: * This vulnerability affects only Node.js 20.x users prior to the llhttp v9 upgrade.

Severity

6.5 (Medium)


                  
                    CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2025-23167"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-19T02:15:17Z",
    "severity": "MODERATE"
  },
  "details": "A flaw in Node.js 20\u0027s HTTP parser allows improper termination of HTTP/1 headers using `\\r\\n\\rX` instead of the required `\\r\\n\\r\\n`.\nThis inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests.\n\nThe issue was resolved by upgrading `llhttp` to version 9, which enforces correct header termination.\n\nImpact:\n* This vulnerability affects only Node.js 20.x users prior to the `llhttp` v9 upgrade.",
  "id": "GHSA-hchw-qwx7-4w4c",
  "modified": "2025-05-19T03:30:30Z",
  "published": "2025-05-19T03:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23167"
    },
    {
      "type": "WEB",
      "url": "https://nodejs.org/en/blog/vulnerability/may-2025-security-releases"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
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}

CVE-2025-23167 (GCVE-0-2025-23167)

Vulnerability from cvelistv5 – Published: 2025-05-19 01:25 – Updated: 2025-05-27 18:31

Summary

A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\r\n\rX` instead of the required `\r\n\r\n`. This inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests. The issue was resolved by upgrading `llhttp` to version 9, which enforces correct header termination. Impact: * This vulnerability affects only Node.js 20.x users prior to the `llhttp` v9 upgrade.

Severity

6.5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-19 15:09 UTC

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Assigner

hackerone mitre root

References

1 reference

URL	Tags
https://nodejs.org/en/blog/vulnerability/may-2025…

Impacted products

1 product

Vendor	Product	Version
nodejs	node	Affected: 4.0 , < 4.* (semver) Affected: 5.0 , < 5.* (semver) Affected: 6.0 , < 6.* (semver) Affected: 7.0 , < 7.* (semver) Affected: 8.0 , < 8.* (semver) Affected: 9.0 , < 9.* (semver) Affected: 10.0 , < 10.* (semver) Affected: 11.0 , < 11.* (semver) Affected: 12.0 , < 12.* (semver) Affected: 13.0 , < 13.* (semver) Affected: 14.0 , < 14.* (semver) Affected: 15.0 , < 15.* (semver) Affected: 16.0 , < 16.* (semver) Affected: 17.0 , < 17.* (semver) Affected: 18.0 , < 18.* (semver) Affected: 19.0 , < 19.* (semver) Affected: 20.0 , ≤ 20.19.1 (semver)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.