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Fencer Vulns
high 7.5

CVE-2020-12604 json

Envoy version 1.14.2, 1.13.2, 1.12.4 or earlier is susceptible to increased memory usage in the case where an HTTP/2 client requests a larg…

published 2020-07-01 6 y ago modified 2026-09-08 2 mo ago also BIT-envoy-2020-12604 , EUVD-2020-4906 , GHSA-8hf8-8gvw-ggvx

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

Envoy version 1.14.2, 1.13.2, 1.12.4 or earlier is susceptible to increased memory usage in the case where an HTTP/2 client requests a large payload but does not send enough window updates to consume the entire stream and does not reset the stream.

Patch / fix

  • bitnami envoy 1.12.5, 1.13.3, 1.14.3
  • servicemesh-proxy service mesh 1.0 1.0.11-1.el8
  • servicemesh-proxy service mesh 1.1 1.1.4-2.el8

red hat advisories RHSA-2020:2864RHSA-2020:2798

  • envoy-proxy Package Hub 15 SP3, openSUSE Leap 15.3 1.14.6-bp153.3.4.1

opensuse advisories openSUSE-SU-2022:0065-1

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-2020-12604 updated cvss 7.5

envoy: Resource exhaustion via HTTP/2 client requests with large payloads and improper stream windows

  • Red Hat OpenShift Service Mesh 1.0 servicemesh-proxy 1.0.11-1.el8
    fixed: vendor fix RHSA-2020:2864
  • Red Hat OpenShift Service Mesh 1.1 servicemesh-proxy 1.1.4-2.el8
    fixed: vendor fix RHSA-2020:2798

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

1.70% chance of exploitation in the next 30 days, higher than 77% 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
<1.12.5
>=1.13.2, <1.13.3
>=1.14.2, <1.14.3
1.12.5
1.13.3
1.14.3

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

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.