CVE-2026-58044
📛 CVE Title
CVE-2026-58044
Description
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**.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- hackerone
- CVSS severity
- LOW
- CVSS score
- 3.7 / 10
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N- Effective score
- 3.7 / 10 LOW source: CNA overview
- CWE(s)
-
CWE-444 - Reserved
- 2026-06-27
- Published
- 2026-08-04 00:49 UTC
- Last updated
- 2026-08-04 00:49 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/58xxx/CVE-2026-58044.json
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-08-04 01:16:20 UTC
- NVD last modified
- 2026-08-04 16:16:26 UTC
- EPSS score
- 0.0028 (probability of exploitation in next 30 days)
- EPSS percentile
- 20.46% vs all CVEs — higher = more likely to be exploited, as of 2026-08-04
NVD / KEV / EPSS data refreshed 2026-08-04 20:29 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-52563 - Assigner
- hackerone
- Published
- Aug 4, 2026, 12:49:58 AM
- Updated
- Aug 4, 2026, 3:03:46 PM
- EUVD base score (CVSS 3.0)
-
3.7 / 10
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N - EUVD-reported EPSS
- 0.0000
- Vendors
- nodejs
- Products
-
Node (26.5.0 ≤26.5.0)Node (22.23.1 ≤22.23.1)Node (24.18.0 ≤24.18.0)
- Aliases
-
GHSA-6hff-9f4h-85xm
ENISA description: 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**.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| nodejs | node |
26.5.0 (affected),
24.18.0 (affected),
22.23.1 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://nodejs.org/en/blog/vulnerability/july-2026-security-releases support@hackerone.com
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-58044.json.
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "node",
"vendor": "nodejs",
"versions": [
{
"lessThanOrEqual": "26.5.0",
"status": "affected",
"version": "26.5.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "24.18.0",
"status": "affected",
"version": "24.18.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "22.23.1",
"status": "affected",
"version": "22.23.1",
"versionType": "semver"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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.\r\n\r\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.\r\n\r\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**."
}
],
"metrics": [
{
"cvssV3_0": {
"baseScore": 3.7,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-444",
"description": "CWE-444 HTTP Request Smuggling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-04T00:49:58.297Z",
"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"shortName": "hackerone"
},
"references": [
{
"url": "https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"assignerShortName": "hackerone",
"cveId": "CVE-2026-58044",
"datePublished": "2026-08-04T00:49:58.297Z",
"dateReserved": "2026-06-27T15:00:00.780Z",
"dateUpdated": "2026-08-04T00:49:58.297Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}