CVE-2026-56850
Received
Received - Intake
Node.js HTTPS Agent PFX Key Collision mTLS Identity Reuse
Vulnerability report for CVE-2026-56850, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-07-30
Last updated on: 2026-07-30
Assigner: HackerOne
Description
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**.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| nodejs | node.js | 26.x |
| nodejs | node.js | 24.x |
| nodejs | node.js | 22.x |
| nodejs | node.js | From 26.x (inc) |
| nodejs | node.js | From 24.x (inc) |
| nodejs | node.js | From 22.x (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-287 | When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. |
