Resource exhaustion in ws - CVE-2026-48779
Published: May 25, 2026
Vulnerability identifier: #VU132291
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-48779
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: WebSockets
Affected software:
ws
ws
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the WebSocket message handling logic when processing a high volume of exceptionally small fragments and data chunks. A remote attacker can send a large number of tiny fragmented messages to cause a denial of service.
The issue can lead to process termination due to out-of-memory conditions.
How to mitigate CVE-2026-48779
Install security update from vendor's website.