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Fencer Vulns
high 7.5

CVE-2020-8661 json

CNCF Envoy through 1.13.0 may consume excessive amounts of memory when responding internally to pipelined requests.

published 2020-03-04 6 y ago modified 2026-10-05 34 d ago also BIT-envoy-2020-8661 , EUVD-2020-29509 , GHSA-36cq-ww7h-p4j7

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

CNCF Envoy through 1.13.0 may consume excessive amounts of memory when responding internally to pipelined requests.

Patch / fix

  • servicemesh-proxy service mesh 1.0 1.0.9-2.el8

red hat advisories RHSA-2020:0734

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-8661 updated cvss 7.5

envoy: Response flooding for HTTP/1.1

  • Red Hat OpenShift Service Mesh 1.0 servicemesh-proxy 1.0.9-2.el8
    fixed: vendor fix RHSA-2020:0734

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.87% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami envoy
<=1.13.0
 no fix listed

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.