What is CVE-2026-42790?

CVE-2026-42790 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. nameConstraints DNS bypass via subject CommonName fallback in public_key hostname verification

Which CVE IDs does CVE-2026-42790 cover?

CVE-2026-42790 covers the following CVE IDs: CVE-2026-42790. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

CVE-2026-42790High

nameConstraints DNS bypass via subject CommonName fallback in public_key hostname verification

Vendor

Microsoft Security Response Center (MSRC)

Published

June 1, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-42790 →