What is CVE-2026-86537?

CVE-2026-86537 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Apache Thrift: A truncated HTTP request stops the D library's server, allowing an unauthenticated remote attacker to deny service

Which CVE IDs does CVE-2026-86537 cover?

CVE-2026-86537 covers the following CVE IDs: CVE-2026-86537. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-86537?

CVE-2026-86537 affects 1 product, including: azl3 mtools 4.0.43-2 on Azure Linux 3.0.

CVE-2026-86537High

Apache Thrift: A truncated HTTP request stops the D library's server, allowing an unauthenticated remote attacker to deny service

Vendor

Microsoft Security Response Center (MSRC)

Published

October 7, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-86537 →

🎯 Affected products1

azl3 mtools 4.0.43-2 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update) — fixed build 0.25.0-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-86537
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade