CVE-2026-102825 — Russh: Configured server auth-attempt cap is not enforced in the USERAUTH_REQUEST runtime path
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…
Published: 2026-09-29 · CVSS: 3.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7