CVE-2026-56862

—

CVSS 3.1

7.5 high

EPSS

<1%p45

Published

Aug 13, 2026 (Aug 13, 2026)

Modified

Sep 3, 2026

Description

Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.

Weakness: CWE-770
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.6%)

In the news0 stories

No ingested article mentions this CVE yet.