What is CVE-2026-3849?

CVE-2026-3849 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Buffer Overflow in HPKE via Oversized ECH Config

Which CVE IDs does CVE-2026-3849 cover?

CVE-2026-3849 covers the following CVE IDs: CVE-2026-3849. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

CVE-2026-3849Medium

Buffer Overflow in HPKE via Oversized ECH Config

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-3849 · pending