Vulnerability-Lookup

CVE-2026-48932 (GCVE-0-2026-48932)

Vulnerability from cvelistv5 – Published: 2026-09-01 02:08 – Updated: 2026-09-01 14:48

Summary

A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection. Node.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.

Severity

3.7 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 14:48 UTC

CWE

CWE-444 - HTTP Request Smuggling

Assigner

hackerone mitre root

References

1 reference

URL	Tags
https://hackerone.com/reports/3564941

Impacted products

1 product

Vendor	Product	Version	CPE status
nodejs	node	Affected: 22.22.3 , ≤ 22.22.3 (semver) Affected: 24.16.0 , ≤ 24.16.0 (semver) Affected: 26.3.0 , ≤ 26.3.0 (semver)	guessed

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JSON

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FKIE_CVE-2026-48932

Vulnerability from fkie_nvd - Published: 2026-09-01 03:16 - Updated: 2026-09-01 15:17

Severity

3.7 (Low) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	support@hackerone.com	https://hackerone.com/reports/3564941

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "defaultStatus": "unaffected",
          "product": "node",
          "vendor": "nodejs",
          "versions": [
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              "status": "affected",
              "version": "22.22.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "24.16.0",
              "status": "affected",
              "version": "24.16.0",
              "versionType": "semver"
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              "lessThanOrEqual": "26.3.0",
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    }
  ],
  "id": "CVE-2026-48932",
  "lastModified": "2026-09-01T15:17:15.057",
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GHSA-44CW-V76J-7FVV

Vulnerability from github – Published: 2026-09-01 03:31 – Updated: 2026-09-01 03:31

Details

A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible IncomingMessage headers while piping the original body to a reused backend connection.

Node.js can omit headers beyond maxHeadersCount / maxHeaderPairs from req.headers, req.rawHeaders, and req.headersDistinct, while still using those omitted headers internally for HTTP message framing. In particular, Content-Length can be hidden from userland while the request body is still delivered.

This vulnerability affects all supported release lines: Node.js 22, Node.js 24, and Node.js 26.

Severity

3.7 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-48932"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-01T03:16:48Z",
    "severity": "LOW"
  },
  "details": "A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection.\n\nNode.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered.\n\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.",
  "id": "GHSA-44cw-v76j-7fvv",
  "modified": "2026-09-01T03:31:03Z",
  "published": "2026-09-01T03:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48932"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3564941"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

CVE-2026-48932 (GCVE-0-2026-48932)

FKIE_CVE-2026-48932

GHSA-44CW-V76J-7FVV

Tags

Sightings

Nomenclature