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Case File

CVE-2019-18802

CRITICAL · CVSS 9.8 EPSS 2.46% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2019-12-13 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2019-18802
Severity
CRITICAL
CVSS
9.8
EPSS
2.46%

Original 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.