CVE-2026-48779

ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.

Affected products

Confluence, Ws

Ws Project Ws

< 5.2.5, 6.2.4, 7.5.11, 8.21.0

Fix

Available

CVSS 3.1

7.5 HIGH

EPSS

0.8% (52th percentile)

Weakness

CWE-770, CWE-1050, CWE-400

NVD status

Modified

Published

2026-06-16

No exploit for CVE-2026-48779 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.