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Russh: Configured server auth-attempt cap is not enforced in the USERAUTH_REQUEST runtime path

Type: advisorySource: Official CVE ListRisk context updated1 source record

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.

Announced Source revision 2
Original source ↗
CVE context updated. The publisher announcement is unchanged.

CVE-2026-102825

Primary source · Revision 2

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-102825

russh

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Eugeny",
    "product": "russh",
    "versions": [
      {
        "status": "affected",
        "version": "< 0.62.6"
      }
    ]
  }
]
Related CVEs
CVE-2026-102825

Source reference: /cveMetadata/cveId

Publisher severity

low

Source reference: /containers/cna/metrics

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-102825 · Low

russh

Event
#51902 · Revision 2
Added to Heist Feed
Publisher date
Read the original announcement