CVE-2026-48108

CVE-2026-48108 · Russh: SSH identification parsing accepted non-canonical client banners and did not bound pre-banner input

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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.

CVSS 5.3 · Moyenne · EPSS 0,3% · Correctif disponible

Publication

2026-06-10T20:24:56.666Z

Mise à jour

2026-06-11T13:50:36.699Z

Pile logicielle: system

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