Improper Restriction of Excessive Authentication Attempts Affecting openshell package, versions <0:0.1.2-0.2.hum1


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.28% (19th percentile)

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  • Snyk IDSNYK-RHEL10-OPENSHELL-20377171
  • published2 Oct 2026
  • disclosed29 Sept 2026

Introduced: 29 Sep 2026

NewCVE-2026-102825  (opens in a new tab)
CWE-307  (opens in a new tab)

How to fix?

Upgrade RHEL:10 openshell to version 0:0.1.2-0.2.hum1 or higher.
This issue was patched in RHSA-2026:74586.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshell package and not the openshell package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1