Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-56850
nodejs node — A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to…
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L H N U N H N 4.4 .0008 0.2 —
AFFECTED
Product Versions Fixed
node 26.5.0 – —
TIMELINE
Jun 23 Reserved by hackerone
Jul 30 Published (CNA: hackerone)
Aug 25 RESCORED — CVE-2026-56850 (nodejs node). CVSS 4.1 → 4.4 (NVD).
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**.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| June 23, 2026 | Reserved | Reserved by hackerone |
| July 30, 2026 | Published | Published (CNA: hackerone) |
| August 25, 2026 | RESCORED | RESCORED — CVE-2026-56850 (nodejs node). CVSS 4.1 → 4.4 (NVD). |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| nodejs | node | — | 26.5.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-56850 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
