What is CVE-2026-43971?

CVE-2026-43971 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Link Header Directive Smuggling via Unescaped target/rel/Attribute Keys in cow_link:link/1

Which CVE IDs does CVE-2026-43971 cover?

CVE-2026-43971 covers the following CVE IDs: CVE-2026-43971. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-43971?

CVE-2026-43971 affects 2 products, including: 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-2026-43971Medium

Link Header Directive Smuggling via Unescaped target/rel/Attribute Keys in cow_link:link/1

Vendor

Microsoft Security Response Center (MSRC)

Published

August 21, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-43971 →

🎯 Affected products2

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

Security Update — fixed build 3.13.7-9

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43971
patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade