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-2026-45736

CVE-2026-45736HIGH

websockets ws — ws: Uninitialized memory disclosure

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  N  N    7.5   .0067   50.5     —

AFFECTED
  Product  Versions              Fixed
  ws       >= 8.0.0, < 8.20.1 –  —

TIMELINE
  May 13  Reserved by GitHub_M
  May 15  Published (CNA: GitHub_M)
  Aug 24  EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
  Aug 24  RESCORED — CVE-2026-45736 (websockets ws). CVSS 4.4 → 7.5 (NVD).
  Aug 25  EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
  Aug 26  EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
  Aug 28  EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
  Sep 7   EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
  Sep 9   EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
  Sep 10  EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
  Sep 11  EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.

CWE-908, CWE-824 · CNA: GitHub_M · CVSS v3.1 · 32 references · NVD status: Modified

Description

ws is an open source WebSocket client and server for Node.js. Prior to 8.20.1, the websocket.close() implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. This vulnerability is fixed in 8.20.1.

Lifecycle

Complete event history — 11 events, chronological
Date	Event	Detail
May 13, 2026	Reserved	Reserved by GitHub_M
May 15, 2026	Published	Published (CNA: GitHub_M)
August 24, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
August 24, 2026	RESCORED	RESCORED — CVE-2026-45736 (websockets ws). CVSS 4.4 → 7.5 (NVD).
August 25, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
August 26, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
August 28, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
September 7, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
September 9, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
September 10, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.
September 11, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45736 (websockets ws). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
websockets	ws	—	>= 8.0.0, < 8.20.1	—

Weaknesses

CWE-908 · CWE-824

References (32)

Authoritative record: CVE-2026-45736 at cve.org

Vendors: websockets

Weaknesses: CWE-908 · CWE-824

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-45736 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.