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**.

CVSS 3.1

3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-25)

CWE

CWE-367

Published

2026-06-22

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• nodejs:node.js

References

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

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