Vulnerability Database

309,961

Total vulnerabilities in the database

CVE-2023-0836

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.

  • Published: Mar 29, 2023
  • Updated: Nov 16, 2025
  • CVE: CVE-2023-0836
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWEs:

Software From Fixed in
haproxy / haproxy 2.7.0 2.7.0.x
haproxy / haproxy 2.6.0 2.6.8.x
haproxy / haproxy 2.5.0 2.5.11.x
haproxy / haproxy 2.4.0 2.4.21.x
haproxy / haproxy 2.3.0 2.3.0.x
haproxy / haproxy 2.2.0 2.2.27
haproxy / haproxy 2.1.0 2.1.0.x