CVE-2025-11230

HIGH

Published Nov 19, 2025 Modified Dec 19, 2025 CWE-407

Description

Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-407 CWE-407

Affected Products

Vendor	Product	Versions
haproxy	aloha_appliance	14.5.0 — 14.5.33
haproxy	aloha_appliance	15.5.0 — 15.5.28
haproxy	aloha_appliance	16.5.0 — 16.5.19
haproxy	aloha_appliance	17.0.0 — 17.0.7
haproxy	haproxy	2.4.0 — 2.4.30
haproxy	haproxy	2.6.0 — 2.6.23
haproxy	haproxy	2.8.0 — 2.8.16
haproxy	haproxy	3.0.0 — 3.0.12
haproxy	haproxy	3.1.0 — 3.1.9
haproxy	haproxy	3.2.0 — 3.2.6
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	haproxy_enterprise	All
haproxy	kubernetes_ingress_controller	< 1.9.14-ee7
haproxy	kubernetes_ingress_controller	< 3.1.12
haproxy	kubernetes_ingress_controller	1.10.10-ee1 — 1.11.12-ee10
haproxy	kubernetes_ingress_controller	3.0.0-ee1 — 3.0.15-ee4

References

Advisories & Patches

https://www.haproxy.com/blog/october-2025-cve-2025-11230-haproxy-mjson-library-denial-of-service-vulnerability

Frequently Asked Questions

What is CVE-2025-11230? +

Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-11230? +

CVE-2025-11230 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-11230? +

CVE-2025-11230 affects products from haproxy, specifically: aloha_appliance, haproxy, haproxy_enterprise, kubernetes_ingress_controller. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-11230? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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Quick Facts

CVSS Score: 7.5
Severity: HIGH
Published: Nov 19, 2025

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