What is CVE-2026-43969?

CVE-2026-43969 is a security advisory published by Microsoft Security Response Center (MSRC) with Low severity. Cookie Request Header Injection via Unvalidated Encoder in cow_cookie:cookie/1

Which CVE IDs does CVE-2026-43969 cover?

CVE-2026-43969 covers the following CVE IDs: CVE-2026-43969. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-43969?

CVE-2026-43969 has a CVSS v3 base score of 3.2, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-43969?

CVE-2026-43969 affects 5 products, including: azl3 rabbitmq-server 3.13.7-3 on Azure Linux 3.0; azl3 rabbitmq-server 3.13.7-5 on Azure Linux 3.0; azl3 rabbitmq-server 3.13.7-6 on Azure Linux 3.0; azl3 rabbitmq-server 3.13.7-8 on Azure Linux 3.0; azl3 rabbitmq-server 3.13.7-9 on Azure Linux 3.0.

CVE-2026-43969LowCVSS 3.2

Cookie Request Header Injection via Unvalidated Encoder in cow_cookie:cookie/1

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-43969 →

🎯 Affected products5

azl3 rabbitmq-server 3.13.7-3 on Azure Linux 3.0
azl3 rabbitmq-server 3.13.7-5 on Azure Linux 3.0
azl3 rabbitmq-server 3.13.7-6 on Azure Linux 3.0
azl3 rabbitmq-server 3.13.7-8 on Azure Linux 3.0
azl3 rabbitmq-server 3.13.7-9 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43969
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade