CVE-2026-48931
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HTTP Response Splitting in Node.js HTTP Agent

Publication date: 2026-06-22

Last updated on: 2026-06-22

Assigner: HackerOne

Description
A flaw in Node.js HTTP Agent can cause a client to accept as valid a response that is send before the client has sent the request. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
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Meta Information
Published
2026-06-22
Last Modified
2026-06-22
Generated
2026-06-23
AI Q&A
2026-06-22
EPSS Evaluated
N/A
NVD
CVE-2026-48931
EUVD
EUVD-2026-38344
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
nodejs node.js 22
nodejs node.js 24
nodejs node.js 26
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-367 The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.
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Executive Summary

This vulnerability is a flaw in the Node.js HTTP Agent where a client can mistakenly accept a response as valid even before it has sent the corresponding request.

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

Impact Analysis

The vulnerability could lead to a client accepting responses prematurely, which may cause unexpected behavior or potential security issues such as information misinterpretation or logic errors in applications relying on Node.js HTTP Agent.

The CVSS score of 3.7 indicates a low severity impact with no confidentiality or availability impact, but a low integrity impact.

Mitigation Strategies

To mitigate this vulnerability, users should update Node.js to the latest patched versions of the supported release lines: Node.js 22, Node.js 24, and Node.js 26.

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