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

Low severity · published Jun 22, 2026

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

3.7

CVSS

0.3%

EPSS

On KEV

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**.

CVSS vector

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

Attack vector

Network

Complexity

High

Privileges

None

User interaction

None

Confidentiality

None

Integrity

Low

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.3% · higher than 25% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

node · nodejs

22.22.3 through 22.22.3; 24.16.0 through 24.16.0; 26.3.0 through 26.3.0 · source: vendor

Node.js · Nodejs

22.22.3; 24.16.0; 26.3.0 · source: NVD

Affected product

node

nodejs

All node CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-48931

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-48931

Vendor Advisory

https://nodejs.org/en/blog/vulnerability/june-2026-security-releases

www.openwall.com

http://www.openwall.com/lists/oss-security/2026/07/02/2

Exploit

https://github.com/nodejs/node/issues/63989

Third Party Advisory

https://jdstaerk.substack.com/p/nodejs-security-fix-silently-broke