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CVE-2025-11230

Good to know:

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Date: November 19, 2025

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

Severity Score

Related Resources (3)

https://www.haproxy.com/blog/october-2025-cve-2025-11230-haproxy-mjson-library-denial-of-service-vulnerability
https://nvd.nist.gov/vuln/detail/CVE-2025-11230
https://www.mend.io/vulnerability-database/CVE-2025-11230

Severity Score

Weakness Type (CWE)

Inefficient Algorithmic Complexity

CWE-407

Top Fix

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Upgrade to version https://github.com/haproxy/haproxy.git - v3.3-dev9

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): HIGH

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