CVE-2026-56850: 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**.
Overview
- Severity
- Medium (CVSS 4.1)
- CVSS Vector
- CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Jul
- Released
- 2026-08-07
- EPSS Score
- 0.08% (percentile: 0.3%)
Affected Products (1)
Other
Revision History
- 2026-08-07: Information published.