CVE-2026-48779

Severity CVSS v4.0:

Pending analysis

Type:

CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')

Publication date:

17/06/2026

Last modified:

30/07/2026

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:ws_project:ws::::::node.js::*	1.1.0 (including)	5.2.5 (excluding)
cpe:2.3:a:ws_project:ws::::::node.js::*	6.0.0 (including)	6.2.4 (excluding)
cpe:2.3:a:ws_project:ws::::::node.js::*	7.0.0 (including)	7.5.11 (excluding)
cpe:2.3:a:ws_project:ws::::::node.js::*	8.0.0 (including)	8.21.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-48779

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools