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_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.

• CWE-327

• https://github.com/Eugeny/russh/commit/8da8967f196472576b1565d518a0ed60fce60f0c
• https://github.com/Eugeny/russh/releases/tag/v0.63.0
• https://github.com/Eugeny/russh/security/advisories/GHSA-w3jg-pjxf-73p4

Published

Sep 29, 2026

Last Modified

Sep 29, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-102811Marmite through 0.4.2 contains missing authentication in the…7.5
• CVE-2026-10282A security vulnerability has been detected in Bottelet Dayby…5.3
• CVE-2026-102820pageant provides a [PageantStream] type that implements [Asy…6.2
• CVE-2026-102821Russh is a Rust SSH client and server library. Prior to 0.63…6.5
• CVE-2026-102822Russh is a Rust SSH client and server library. Prior to 0.63…3.7
• CVE-2026-102823Russh is a Rust SSH client and server library. Prior to 0.63…7.5
• CVE-2026-102825Russh is a Rust SSH client and server library. Prior to 0.62…3.7
• CVE-2026-102826simple-git, an interface for running git commands in any nod…8.1
• CVE-2026-102827simple-git, an interface for running git commands in any nod…8.1
• CVE-2026-102828simple-git, an interface for running git commands in any nod…9.2
• CVE-2026-102829simple-git, an interface for running git commands in any nod…9.2
• CVE-2026-10283A vulnerability was detected in Bottelet DaybydayCRM up to 2…6.3