CVE-2026-102825
Russh: Configured server auth-attempt cap is not enforced in the USERAUTH_REQUEST runtime path
LOW 3.7EPSS 0.3%
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
- Eugeny · russh
- CVSS v3.1 GITHUB
- 3.7 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS
- 0.28% chance of exploitation in the next 30 days, 19th percentile
- Published
- 2026-09-29
- Updated
- 2026-09-30