CVE-2026-48779

HIGH EPSS 40.5%
Published Jun 17, 20262w ago · Modified Jun 18, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jun 17, 2026 2w ago
Last Modified Jun 18, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
40.5% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-400 Uncontrolled Resource Consumption Resource Mgmt
CWE-770

Affected Products 4

VendorProductVersionRange
ws_projectws*≥1.1.0  –  <5.2.5
ws_projectws*≥6.0.0  –  <6.2.4
ws_projectws*≥7.0.0  –  <7.5.11
ws_projectws*≥8.0.0  –  <8.21.0

References 5

  • github.com https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7
    Patch
  • github.com https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53
    Patch
  • github.com https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94
    Patch
  • github.com https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8
    Patch
  • github.com https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p
    MitigationPatchVendor AdvisoryExploit

Remediation

  • github.com https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7
    Patch
  • github.com https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53
    Patch
  • github.com https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94
    Patch
  • github.com https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8
    Patch
  • github.com https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p
    MitigationPatchVendor AdvisoryExploit