What is CVE-2026-27199?

CVE-2026-27199 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Werkzeug safe_join() allows Windows special device names

Which CVE IDs does CVE-2026-27199 cover?

CVE-2026-27199 covers the following CVE IDs: CVE-2026-27199. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-27199?

CVE-2026-27199 affects 2 products, including: azl3 python-werkzeug 3.0.3-2 on Azure Linux 3.0; cbl2 python-werkzeug 2.3.7-3 on CBL Mariner 2.0.

CVE-2026-27199Medium

Werkzeug safe_join() allows Windows special device names

Vendor

Microsoft Security Response Center (MSRC)

Published

February 25, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-27199 →

🎯 Affected products2

azl3 python-werkzeug 3.0.3-2 on Azure Linux 3.0
cbl2 python-werkzeug 2.3.7-3 on CBL Mariner 2.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27199