Improper Certificate Validation in Node.js - CVE-2026-58040
Published: July 29, 2026 / Updated: July 29, 2026
Vulnerability identifier: #VU140042
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-58040
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Affected software:
Node.js
Node.js
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass hostname verification.
The vulnerability exists due to improper certificate validation in the Node.js HTTPS Agent when reusing TLS sessions across identity policies. A remote attacker can trigger TLS session reuse to bypass hostname verification.
This issue was identified as an incomplete fix for CVE-2026-48934.
How to mitigate CVE-2026-58040
Install security update from vendor's website.