Resource exhaustion in envoy - CVE-2020-8663
Published: June 30, 2020 / Updated: August 26, 2026
Vulnerability identifier: #VU145857
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2020-8663
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in connection handling when accepting a flood of connections. A remote attacker can send a large number of connection attempts to cause a denial of service.
Affected software
envoy
How to mitigate CVE-2020-8663
Install security update from vendor's website.
envoy - addressed in versions 1.12.5, 1.13.3, 1.14.3