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High severity7.5NVD Advisory· Published Aug 13, 2026· Updated Sep 3, 2026

CVE-2026-56862

CVE-2026-56862

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.

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Affected products

4517

Patches

Vulnerability mechanics

References

4

News mentions

0

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