What is CVE-2026-66357?

CVE-2026-66357 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. inets,httpd:HTTP Request Smuggling via obs-fold Header Continuation

Which CVE IDs does CVE-2026-66357 cover?

CVE-2026-66357 covers the following CVE IDs: CVE-2026-66357. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-66357?

CVE-2026-66357 affects 2 products, including: azl3 erlang 26.2.5.21-4 on Azure Linux 3.0; azl3 erlang 26.2.5.21-6 on Azure Linux 3.0.

CVE-2026-66357High

inets,httpd:HTTP Request Smuggling via obs-fold Header Continuation

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-66357 →

🎯 Affected products2

azl3 erlang 26.2.5.21-4 on Azure Linux 3.0
azl3 erlang 26.2.5.21-6 on Azure Linux 3.0

✅ Remediation

Security Update — fixed build 26.2.5.21-6

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66357
patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade