CVE-2026-102825: Eugeny Russh

Low severity, CVSS 3.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Russh is a Rust SSH client and server library. Prior to 0.62.6, the USERAUTH_REQUEST path reached from server::run_stream in russh/src/server/encrypted.rs increments self.common.auth_attempts but never compares it with server::Config.max_auth_attempts. An unauthenticated remote client can continue submitting authentication requests on one connection beyond the configured cap, bypassing the deployment's attempt-limiting policy and increasing online guessing opportunity and backend authentication workload. This issue is fixed in version 0.62.6.

Affected products

• Eugeny Russh: before 0.62.6 (fixed in 0.62.6)

Published 2026-09-29. Last modified 2026-09-30.