CVE-2020-8659
CVSS v3
7.5
HIGH
EPSS Score
1.9 %
exploit probability, as of 2026-10-02
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
CNCF Envoy through 1.13.0 may consume excessive amounts of memory when proxying HTTP/1.1 requests or responses with many small (i.e. 1 byte) chunks.
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2020-03-03
- Last Modified
- 2026-10-02
Frequently asked questions
What is CVE-2020-8659?
CNCF Envoy through 1.13.0 may consume excessive amounts of memory when proxying HTTP/1.1 requests or responses with many small (i.e. 1 byte) chunks.
Is CVE-2020-8659 actively exploited?
Active exploitation of CVE-2020-8659 has not been confirmed. Its EPSS score was 1.9% on 2026-10-02, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-8659?
CVE-2020-8659 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
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