CVE-2026-48931

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**.

Score

CVSS 3.1 3.7 Low

Status

Modified - support@hackerone.com

Published

2026-06-22

Last modified

2026-10-25

Weaknesses

CWE-367

Affected products

• Node (Nodejs)
• Node.js (Nodejs)

References

• https://nodejs.org/en/blog/vulnerability/june-2026-security-releases
• https://jdstaerk.substack.com/p/nodejs-security-fix-silently-broke
• https://github.com/nodejs/node/issues/63989
• http://www.openwall.com/lists/oss-security/2026/07/02/2