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Case File

CVE-2021-39242

HIGH · CVSS 7.5 EPSS 2.34%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-17 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. See the original NVD description below for full technical details.

CVE
CVE-2021-39242
Severity
HIGH
CVSS
7.5
EPSS
2.34%

Original NVD Description

An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.

Related CVEs

Other vulnerabilities affecting the same vendor(s)