CVE-2026-56850

Published Jul 30, 2026

Last updated a day ago

Overview

Description
A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
Source
support@hackerone.com
NVD status
Analyzed
Products
node.js

Risk scores

CVSS 3.1

Type
Primary
Base score
4.4
Impact score
3.6
Exploitability score
0.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Severity
MEDIUM

CVSS 3.0

Type
Secondary
Base score
4.1
Impact score
3.6
Exploitability score
0.5
Vector string
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Severity
MEDIUM

Weaknesses

support@hackerone.com
CWE-287

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.