Vulnerability in Envoyproxy Envoy

CVE-2019-18802

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…

EPSS: 0.025 (82.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

References

Frequently asked questions

What is CVE-2019-18802?
CVE-2019-18802 is a critical-severity vulnerability in Envoyproxy Envoy. CVSS score: 9.8/10. Published 2019-12-13.
How severe is CVE-2019-18802?
Critical severity. CVSS v3 base score is 9.8 out of 10.