Input validation error in HAProxy - CVE-2025-11230

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Main Vulnerability Database Vulnerabilities #VU116636

Input validation error in HAProxy - CVE-2025-11230

Published: October 6, 2025


Vulnerability identifier: #VU116636
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-11230
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when parsing number in mjson. A remote attacker can pass specially crafted input to the server and perform a denial of service (DoS) attack.


Affected software

HAProxy
Debian Linux
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
Anolis OS
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
openSUSE Leap
openEuler
Ubuntu
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
haproxy (Red Hat package)
haproxy
haproxy-debugsource
haproxy-debuginfo
haproxy (Ubuntu package)
haproxy-help
haproxy (Debian package)
haproxy-doc

How to mitigate CVE-2025-11230

Install updates from vendor's website.

HAProxy - addressed in versions 2.4.30, 2.6.23, 2.8.16, 3.0.12, 3.1.9, 3.2.6
haproxy (Red Hat package) - addressed in versions 2.4.7-2.el9_0.3, 2.4.17-6.el9_2.3, 2.4.22-3.el9_4.1, 2.4.22-4.el9_6.1, 2.8.14-1.el9_7.1, 3.0.5-4.el10_0.1, 3.0.5-4.el10_1.1
haproxy - addressed in versions 2.4.22+git0.f8e3218e2-150400.3.25.1, 2.8.11+git0.01c1056a4-150600.3.9.1
haproxy-debugsource - addressed in versions 2.4.22+git0.f8e3218e2-150400.3.25.1, 2.8.11+git0.01c1056a4-150600.3.9.1
haproxy-debuginfo - addressed in versions 2.4.22+git0.f8e3218e2-150400.3.25.1, 2.8.11+git0.01c1056a4-150600.3.9.1
haproxy (Ubuntu package) - addressed in versions 2.4.24-0ubuntu0.22.04.3, 2.8.5-1ubuntu3.4, 3.0.8-1ubuntu1.2
haproxy-help - addressed in versions 2.6.6-18, 2.9.5-12
haproxy-debugsource - addressed in versions 2.6.6-18, 2.9.5-12
haproxy-debuginfo - addressed in versions 2.6.6-18, 2.9.5-12
haproxy - addressed in versions 2.6.6-18, 2.9.5-12
haproxy (Debian package) - addressed in versions 2.6.12-1+deb12u3, 3.0.11-1+deb13u1
haproxy - addressed in versions 2.8.14-1.0.1, 3.0.5-3
haproxy-doc - update to 3.0.5-3
haproxy - addressed in versions 3.0.23-1.fc42, 3.0.23-1.fc43, 3.0.23-1.fc44

External References

Related Security Bulletins