Disclosure summary
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-reported weakness categories
CWE-307
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
GitHub Reviewed Security Advisories · GHSA-g6xm-f9xp-qq35
Open original source · Updated Sep 30, 2026
Russh: Configured server auth-attempt cap is not enforced in the USERAUTH_REQUEST runtime path
Source severity: LOW / 0
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| rust | russh | 0.62.6 |
NIST National Vulnerability Database · NVD-CVE-2026-102825
Open original source · Updated Sep 30, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
Original records & references
PUBLISHED 2026-09-29T15:17:24-04:00
MODIFIED 2026-09-30T16:17:24-04:00
INGESTED 2026-10-06T11:43:05-04:00