CVE-2023-0836

HIGH

HAProxy 2.1-2.2.26, 2.3-2.4.20, 2.5-2.5.10, 2.6-2.6.7, 2.7 - Information Disclosure

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0120
EPSS Percentile 64.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-200 CWE-459
Status published
Products (4)
haproxy/haproxy 2.1.0
haproxy/haproxy 2.3.0
haproxy/haproxy 2.7.0
haproxy/haproxy 2.2.0 - 2.2.27
Published Mar 29, 2023
Tracked Since Feb 18, 2026