CVE-2018-1000518
HIGHwebsockets 4.0-4.9 - Denial of Service via Compressed Frame Amplification
Title source: llmDescription
aaugustin websockets version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appear to be exploitable via Sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in 5.
References (1)
Core 1
Core References
Exploit, Patch, Third Party Advisory x_refsource_misc
https://github.com/aaugustin/websockets/pull/407
Scores
CVSS v3
7.5
EPSS
0.0182
EPSS Percentile
76.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-400
Status
published
Products (2)
pypi/websockets
4.0 - 5.0PyPI
websockets_project/websockets
4.0
Published
Jun 26, 2018
Tracked Since
Feb 18, 2026