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

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-06-10T20:24:56.666Z",
    "modified": "2026-06-10T20:24:56.666Z",
    "type": "cve",
    "title": "Russh: SSH identification parsing accepted non-canonical client banners and did not bound pre-banner input",
    "source": "GitHub_M",
    "references": "https://github.com/Eugeny/russh/security/advisories/GHSA-76r6-x97p-67vr",
    "id": "CVE-2026-48108",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20"
    ],
    "cvelist": null,
    "sourceData": "Eugeny russh >= 0.34.0-beta.1, < 0.61.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "russh",
    "version": ">= 0.34.0-beta.1, < 0.61.0",
    "vendor": "Eugeny",
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    "ai_score": 0
}