Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth_CVE-2026-42189

{
    "lastseen": "",
    "description": "Russh is a Rust SSH client & server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's keyboard-interactive authentication handler. A malicious client can crash any russh-based server that implements keyboard-interactive auth (e.g., for 2FA/TOTP) with a single malformed packet, requiring no credentials. This issue has been patched in version 0.60.1.",
    "published": "2026-05-08T19:49:51.179Z",
    "modified": "2026-05-08T19:49:51.179Z",
    "type": "cve",
    "title": "Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth",
    "source": "GitHub_M",
    "references": "https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg\nhttps://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1\nhttps://github.com/Eugeny/russh/releases/tag/v0.60.1",
    "id": "CVE-2026-42189",
    "bulletinFamily": "",
    "cwe": [
        "CWE-770",
        "CWE-789"
    ],
    "cvelist": null,
    "sourceData": "Eugeny russh < 0.60.1",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "russh",
    "version": "< 0.60.1",
    "vendor": "Eugeny",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}