Authentication Bypass by Primary Weakness in Node.js - CVE-2026-56850

Vulnerability identifier: #VU140041

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-56850

CWE-ID: CWE-305

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote user to reuse mutual TLS client identities across requests configured with different client certificates.

The vulnerability exists due to improper connection reuse in the Node.js HTTPS Agent when reusing connections across requests configured with different PFX certificates. A remote user can cause PFX object-array key collisions to reuse mutual TLS client identities across requests configured with different client certificates.

Node.js
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
Debian Linux
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
Web and Scripting Module
openSUSE Leap
corepack16
nodejs16-docs
nodejs16-debuginfo
nodejs16-devel
npm16
nodejs16
nodejs16-debugsource
nodejs18-debugsource
nodejs18-devel
npm18
nodejs18
nodejs18-debuginfo
nodejs18-docs
corepack18
nodejs (Debian package)
nodejs22-debugsource
nodejs22-docs
nodejs22-devel
npm22
corepack22
nodejs22
nodejs22-debuginfo
npm24
nodejs24
nodejs24-debugsource
nodejs24-debuginfo
nodejs24-devel
nodejs24-docs

Install security update from vendor's website.

Node.js - addressed in versions 22.23.2, 24.18.1, 26.5.1
corepack16 - update to 16.20.2-150400.3.42.1
nodejs16-docs - update to 16.20.2-150400.3.42.1
nodejs16-debuginfo - update to 16.20.2-150400.3.42.1
nodejs16-devel - update to 16.20.2-150400.3.42.1
npm16 - update to 16.20.2-150400.3.42.1
nodejs16 - update to 16.20.2-150400.3.42.1
nodejs16-debugsource - update to 16.20.2-150400.3.42.1
nodejs18-debugsource - addressed in versions 18.20.8-8.44.1, 18.20.8-150400.9.39.1
nodejs18-devel - addressed in versions 18.20.8-8.44.1, 18.20.8-150400.9.39.1
npm18 - addressed in versions 18.20.8-8.44.1, 18.20.8-150400.9.39.1
nodejs18 - addressed in versions 18.20.8-8.44.1, 18.20.8-150400.9.39.1
nodejs18-debuginfo - addressed in versions 18.20.8-8.44.1, 18.20.8-150400.9.39.1
nodejs18-docs - addressed in versions 18.20.8-8.44.1, 18.20.8-150400.9.39.1
corepack18 - update to 18.20.8-150400.9.39.1
nodejs (Debian package) - update to 20.19.2+dfsg-1+deb13u3
nodejs22-debugsource - addressed in versions 22.23.2-150600.13.24.1, 22.23.2-150700.3.18.1
nodejs22-docs - addressed in versions 22.23.2-150600.13.24.1, 22.23.2-150700.3.18.1
nodejs22-devel - addressed in versions 22.23.2-150600.13.24.1, 22.23.2-150700.3.18.1
npm22 - addressed in versions 22.23.2-150600.13.24.1, 22.23.2-150700.3.18.1
corepack22 - update to 22.23.2-150600.13.24.1
nodejs22 - addressed in versions 22.23.2-150600.13.24.1, 22.23.2-150700.3.18.1
nodejs22-debuginfo - addressed in versions 22.23.2-150600.13.24.1, 22.23.2-150700.3.18.1
npm24 - update to 24.18.1-150700.15.16.1
nodejs24 - update to 24.18.1-150700.15.16.1
nodejs24-debugsource - update to 24.18.1-150700.15.16.1
nodejs24-debuginfo - update to 24.18.1-150700.15.16.1
nodejs24-devel - update to 24.18.1-150700.15.16.1
nodejs24-docs - update to 24.18.1-150700.15.16.1

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

• Multiple vulnerabilities in Node.js
• SUSE update for nodejs24
• SUSE update for nodejs22
• SUSE update for nodejs22
• SUSE update for nodejs18
• SUSE update for nodejs18
• Debian update for nodejs
• SUSE update for nodejs16