CVE-2026-58044

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-58044
StatePUBLISHED
Assignerhackerone
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 01:16:20 UTC
Updated2026-08-04 01:16:20 UTC
DescriptionA 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**.

Risk And Classification

Primary CVSS: v3.0 3.7 LOW from [email protected]

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

Problem Types: CWE-444 | CWE-444 CWE-444 HTTP Request Smuggling

VersionSourceTypeScoreSeverityVector
3.0[email protected]Secondary3.7LOWCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.0CNADECLARED3.7LOWCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nodejs Node affected 26.5.0 26.5.0 semver Not specified
CNA Nodejs Node affected 24.18.0 24.18.0 semver Not specified
CNA Nodejs Node affected 22.23.1 22.23.1 semver Not specified

References

ReferenceSourceLinkTags
nodejs.org/en/blog/vulnerability/july-2026-security-releases [email protected] nodejs.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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