What is CVE-2025-11230?

CVE-2025-11230 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Denial of service vulnerability in HAProxy mjson library

Which CVE IDs does CVE-2025-11230 cover?

CVE-2025-11230 covers the following CVE IDs: CVE-2025-11230. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-11230?

CVE-2025-11230 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-11230?

CVE-2025-11230 affects 4 products, including: azl3 haproxy 2.9.11-3 on Azure Linux 3.0; azl3 haproxy 2.9.11-4 on Azure Linux 3.0; cbl2 haproxy 2.4.24-1 on CBL Mariner 2.0; cbl2 haproxy 2.4.24-2 on CBL Mariner 2.0.

CVE-2025-11230MediumCVSS 7.5

Denial of service vulnerability in HAProxy mjson library

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-11230 →

🎯 Affected products4

azl3 haproxy 2.9.11-3 on Azure Linux 3.0
azl3 haproxy 2.9.11-4 on Azure Linux 3.0
cbl2 haproxy 2.4.24-1 on CBL Mariner 2.0
cbl2 haproxy 2.4.24-2 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 2.4.24-2 KBCBL-Mariner Releases (Security Update) — fixed build 2.9.11-4

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-11230
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade