CVE-2026-56850
Published: July 31, 2026Last modified: August 3, 2026
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**.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.1 |
| Attack Vector | LOCAL |
| Attack complexity | HIGH |
| Privileges required | HIGH |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | HIGH |
| Availability impact | NONE |
| Vector | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | nodejs | Unknown (18.16.0-r0) |
| 25 LTS | nodejs | Fixed (22.23.2-r0) | |
| Stream | nodejs | Fixed (24.18.1-r0) | |
| Hardened Containers | 23 LTS | nodejs | Unknown (18.16.0-r0) |
| 25 LTS | nodejs | Fixed (22.23.2-r0) | |
| Stream | nodejs | Fixed (24.18.1-r0) |