What is CVE-2026-27571?

CVE-2026-27571 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. nats-server websockets are vulnerable to pre-auth memory DoS

Which CVE IDs does CVE-2026-27571 cover?

CVE-2026-27571 covers the following CVE IDs: CVE-2026-27571. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-27571?

CVE-2026-27571 has a CVSS v3 base score of 5.9, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-27571?

CVE-2026-27571 affects 2 products, including: azl3 telegraf 1.31.0-12 on Azure Linux 3.0; cbl2 telegraf 1.29.4-18 on CBL Mariner 2.0.

CVE-2026-27571MediumCVSS 5.9

nats-server websockets are vulnerable to pre-auth memory DoS

Vendor

Microsoft Security Response Center (MSRC)

Published

February 27, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-27571 →

🎯 Affected products2

azl3 telegraf 1.31.0-12 on Azure Linux 3.0
cbl2 telegraf 1.29.4-18 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.29.4-19 KBCBL-Mariner Releases (Security Update) — fixed build 1.31.0-13

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27571
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade