CVE Watch29 sept 2026

CVE-2026-102824

Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybrid_mlke

CVSS

4.3

Medio

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 29 sept 2026 · Última mod.: 29 sept 2026 · CWE-327

EPSS · 30d

0.1%EPSS · 30 días0.1%

2026-09-302026-10-19

Descripción técnica

Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybrid_mlkem.rs accepts an all-zero 32-byte peer X25519 public key in both server_dh and compute_shared_secret, forcing the X25519 contribution to the combined shared secret to zero. A malicious SSH peer can therefore make the combined secret depend only on ML-KEM, defeating the hybrid exchange's intended fallback protection if ML-KEM is later weakened. This issue is fixed in version 0.63.0.

Referencias oficiales

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