UpHeron
All vulnerabilities

Servers and applications

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.

Severity
High 7.5
Published
29 Mar 2023
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
2.2.27
Sources
NVD

Affected software

SoftwareAffected versions
HAProxyServers and applications · cpe:a:haproxy:haproxy
  • Version 2.7.0
  • From 2.6.0 up to 2.6.8
  • From 2.5.0 up to 2.5.11
  • From 2.4.0 up to 2.4.21
All 7 release lines
  • Version 2.1.0
  • From 2.2.0 before 2.2.27
  • Version 2.3.0
  • From 2.4.0 up to 2.4.21
  • From 2.5.0 up to 2.5.11
  • From 2.6.0 up to 2.6.8
  • Version 2.7.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-0836
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-0836