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Vulnerability record · CVE-2020-8659 · published 4 March 2020

CVE-2020-8659: Envoyproxy envoy allocation without limits vulnerability

Envoyproxy · Envoy

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.

7.5 CVSS 3.1 High EPSS 1.9% · top 21.2% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score, v2 5.0
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
2 Oct 2026Last modified by NVD

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.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2020:0734 Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qv Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00025.html Mailing ListThird Party Advisory
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history Release NotesThird Party Advisory
https://access.redhat.com/errata/RHSA-2020:0734 Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qv Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00025.html Mailing ListThird Party Advisory
https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history Release NotesThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-8659), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.