Low 3.7Published Sep 29, 2026

CVE-2026-102825Russh: Configured server auth-attempt cap is not enforced in the USERAUTH_REQUEST runtime path

Updated under an hour ago (2026-10-19 08:30 UTC)

Does this affect you?

It affects Eugeny russh. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Eugeny russh

Exploited in the last 30 days

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: 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-307
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 30, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Eugeny russh eugeny:russh (from the name)	before 0.62.6	CNA record

References

https://github.com/Eugeny/russh/security/advisories/GHSA-g6xm-f9xp-qq35x-refsource-confirm
https://github.com/Eugeny/russh/commit/f8fd0b11a393364dc7f01a182482d86adafdd653x-refsource-misc
https://github.com/Eugeny/russh/releases/tag/v0.62.6x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.