CVE-2026-102824
MEDIUM
4,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none
Description
AI Translation Available
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.
327
Use of a Broken or Risky Cryptographic Algorithm
DraftCommon Consequences
Security Scopes Affected:
Confidentiality
Integrity
Accountability
Non-Repudiation
Potential Impacts:
Read Application Data
Modify Application Data
Hide Activities
Applicable Platforms
Languages:
Not Language-Specific, Verilog, VHDL
Technologies:
Not Technology-Specific, ICS/OT
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