CVE-2023-0836

Published: Mar 29, 2023Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

An information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.5 before 2.5.11, 2.6 before 2.6.8, 2.7 before 2.7.1. There are 5 bytes left uninitialized in the connection buffer when encoding the FCGI_BEGIN_REQUEST record. Sensitive data may be disclosed to configured FastCGI backends in an unexpected way.

Affected (7)

Products: Haproxy: Haproxy

Haproxy

1 product

Haproxy

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Haproxy Haproxy	2.2.0 ≤ version < 2.2.27
Haproxy Haproxy	2.4.0 ≤ version ≤ 2.4.21
Haproxy Haproxy	2.5.0 ≤ version ≤ 2.5.11
Haproxy Haproxy	2.6.0 ≤ version ≤ 2.6.8
Haproxy Haproxy	Version 2.1.0
Haproxy Haproxy	Version 2.3.0
Haproxy Haproxy	Version 2.7.0