{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-111062",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-15T12:47:13.665Z",
        "datePublished": "2026-11-05T20:47:35.854Z",
        "dateUpdated": "2026-11-05T20:47:35.854Z"
    },
    "containers": {
        "cna": {
            "title": "A russh SSH server accepts a publickey authentication whose signature uses a different algorithm than the one named in the request",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-347",
                            "lang": "en",
                            "description": "CWE-347: Improper Verification of Cryptographic Signature",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 2.3,
                        "baseSeverity": "LOW",
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf"
                },
                {
                    "name": "https://github.com/Eugeny/russh/pull/759",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Eugeny/russh/pull/759"
                },
                {
                    "name": "https://github.com/Eugeny/russh/commit/a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Eugeny/russh/commit/a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2"
                },
                {
                    "name": "https://github.com/Eugeny/russh/releases/tag/v0.64.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Eugeny/russh/releases/tag/v0.64.0"
                }
            ],
            "affected": [
                {
                    "vendor": "Eugeny",
                    "product": "russh",
                    "versions": [
                        {
                            "version": ">= 0.34.0-beta.1, < 0.64.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-11-05T20:47:35.854Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "russh is a Rust SSH client and server library. From version 0.34.0-beta.1 until version 0.64.0, its SSH server does not require the signature algorithm in a public-key authentication signature to match the algorithm named in the authentication request. A client possessing an authorized RSA private key can announce  rsa-sha2-512  while supplying a valid  ssh-rsa  SHA-1 signature, bypassing restrictions or producing misleading audit records when applications rely on the requested algorithm. A valid private-key signature remains required, and russh clients are not affected. This issue is fixed in version 0.64.0."
                }
            ],
            "source": {
                "advisory": "GHSA-j7h2-66j4-ghjf",
                "discovery": "UNKNOWN"
            }
        }
    }
}