What is CVE-2026-27447?

CVE-2026-27447 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup

Which CVE IDs does CVE-2026-27447 cover?

CVE-2026-27447 covers the following CVE IDs: CVE-2026-27447. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-27447?

CVE-2026-27447 has a CVSS v3 base score of 4.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-27447?

CVE-2026-27447 affects 3 products, including: azl3 cups 2.4.16-1 on Azure Linux 3.0; cbl2 cups 2.3.3op2-11 on CBL Mariner 2.0; cbl2 cups 2.3.3op2-11 on CBL-Mariner 2.0.

CVE-2026-27447MediumCVSS 4.8

OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-27447 →

🎯 Affected products3

azl3 cups 2.4.16-1 on Azure Linux 3.0
cbl2 cups 2.3.3op2-11 on CBL Mariner 2.0
cbl2 cups 2.3.3op2-11 on CBL-Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 2.4.17-1 KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27447
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade