What is CVE-2026-102825?

CVE-2026-102825 is a low-severity vulnerability in Eugeny Russh, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 3.7/10. Published 2026-09-29.

How severe is CVE-2026-102825?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Eugeny Russh

CVE-2026-102825

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.

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Eugeny Russh — versions < 0.62.6

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

Frequently asked questions

What is CVE-2026-102825?: CVE-2026-102825 is a low-severity vulnerability in Eugeny Russh, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 3.7/10. Published 2026-09-29.
How severe is CVE-2026-102825?: Low severity. CVSS v3 base score is 3.7 out of 10.