What is CVE-2026-27651?

CVE-2026-27651 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. NGINX ngx_mail_auth_http_module vulnerability

Which CVE IDs does CVE-2026-27651 cover?

CVE-2026-27651 covers the following CVE IDs: CVE-2026-27651. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-27651?

CVE-2026-27651 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-27651?

CVE-2026-27651 affects 2 products, including: azl3 nginx 1.28.2-1 on Azure Linux 3.0; cbl2 nginx 1.22.1-15 on CBL Mariner 2.0.

CVE-2026-27651HighCVSS 7.5

NGINX ngx_mail_auth_http_module vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-27651 →

🎯 Affected products2

azl3 nginx 1.28.2-1 on Azure Linux 3.0
cbl2 nginx 1.22.1-15 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.28.3-1 KBCBL-Mariner Releases (Security Update) — fixed build 1.22.1-16

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27651
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade