low3.7
CVE-2026-102825
Russh: Configured server auth-attempt cap is not enforced in the USERAUTH_REQUEST runtime path
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | russh | <= 0.62.5 | 0.62.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-g6xm-f9xp-qq35
- https://github.com/Eugeny/russh/security/advisories/GHSA-g6xm-f9xp-qq35
- https://nvd.nist.gov/vuln/detail/CVE-2026-102825
- https://github.com/Eugeny/russh/commit/f8fd0b11a393364dc7f01a182482d86adafdd653
- https://github.com/Eugeny/russh/releases/tag/v0.62.6