CVE-2019-18802

Published: Dec 13, 2019Modified: Jun 17, 2026

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

An issue was discovered in Envoy 1.12.0. An untrusted remote client may send an HTTP header (such as Host) with whitespace after the header content. Envoy will treat "header-value " as a different string from "header-value" so for example with the Host header "example.com " one could bypass "example.com" matchers.

Affected (1)

Products: Envoyproxy: Envoy

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Envoyproxy Envoy	Up to 1.12.1

References (10)

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00034.html

Source: cve@mitre.org

https://blog.envoyproxy.io

Source: cve@mitre.org

Product

https://github.com/envoyproxy/envoy/commits/master

Source: cve@mitre.org

Patch

https://github.com/envoyproxy/envoy/security/advisories/GHSA-356m-vhw2-wcm4

Source: cve@mitre.org

ExploitThird Party Advisory

https://groups.google.com/forum/#%21forum/envoy-users

Source: cve@mitre.org

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00034.html

Source: af854a3a-2127-422b-91ae-364da2661108

https://blog.envoyproxy.io

Source: af854a3a-2127-422b-91ae-364da2661108

Product

https://github.com/envoyproxy/envoy/commits/master

Source: af854a3a-2127-422b-91ae-364da2661108

Patch

https://github.com/envoyproxy/envoy/security/advisories/GHSA-356m-vhw2-wcm4

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

https://groups.google.com/forum/#%21forum/envoy-users

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.