CVE-2020-8659

Name: CVE-2020-8659
Creator: NVD / NIST
Published: 2020-03-04T21:15:11.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.84%

Last modified Jun 17, 2026

CVE-2020-8659 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.84% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.84%

76.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Cncf	Envoy	<= 1.13.0
Redhat	Openshift Service Mesh	1.0
Debian	Debian Linux	9.0

References

https://access.redhat.com/errata/RHSA-2020:0734Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qvThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00025.htmlMailing List, Third Party Advisory
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_historyRelease Notes, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0734Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qvThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00025.htmlMailing List, Third Party Advisory
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_historyRelease Notes, Third Party Advisory

Timeline

Published: Mar 4, 2020
Last Modified: Jun 17, 2026
Status: Modified

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.

How severe is CVE-2020-8659?

CVE-2020-8659 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.84% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8659?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8659?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST