CVE-2026-48108
Medium · 5.3CVSS
5.3
EPSS
0.5%
Published
Jun 10, 2026
CISA due date
—
The record
Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, russh did not enforce the SSH identification-string rules as deliberately as OpenSSH. In particular, the server-side identification reader used the same permissive path as the client, allowing pre-banner lines from clients, and the reader did not enforce a bounded number of pre-banner lines. For a library server built on russh, this could allow a remote peer to hold connection setup resources in the cleartext pre-authentication phase with malformed identification input that should have been rejected early. This issue has been patched in version 0.61.0.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| crates.io | russh | 0.34.0-beta.1 | 0.61.0 |
Related vulnerabilities
- GHSA-76r6-x97p-67vr Russh: SSH identification parsing accepted non-canonical client banners and did not bound… Same vulnerability
- GHSA-4r3c-5hpg-58qr Russh SSH message fields were decoded through allocation-first parsers before… Also affects russh
- GHSA-g9g7-5cgw-6v28 Russh: Unchecked keyboard-interactive prompt count in client auth path Also affects russh
- CVE-2026-48110 Russh is a Rust SSH client & server library. Also affects russh
- CVE-2026-46702 Russh is a Rust SSH client & server library. Also affects russh
- CVE-2026-46705 Russh is a Rust SSH client & server library. Also affects russh
- CVE-2026-46673 Russh is a Rust SSH client & server library. Also affects russh
- CVE-2026-48107 Russh is a Rust SSH client & server library. Also affects russh