{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-116794",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-26T21:53:35.168Z",
        "datePublished": "2026-10-28T17:06:57.542Z",
        "dateUpdated": "2026-10-28T17:06:57.542Z"
    },
    "containers": {
        "cna": {
            "title": "russh: Agent server never calls `Agent::confirm`, so keys added with the confirm constraint (`ssh-add -c`) sign without confirmation",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-862",
                            "lang": "en",
                            "description": "CWE-862: Missing Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.3,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-vp5q-ff62-jwqv"
                },
                {
                    "name": "https://github.com/Eugeny/russh/commit/3e04597dc54e36bfc85c21996f7d8d9d224e9826",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Eugeny/russh/commit/3e04597dc54e36bfc85c21996f7d8d9d224e9826"
                },
                {
                    "name": "https://github.com/Eugeny/russh/commit/62db6e7defd6d244159da962ccccb029e785ce0f",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Eugeny/russh/commit/62db6e7defd6d244159da962ccccb029e785ce0f"
                },
                {
                    "name": "https://github.com/Eugeny/russh/releases/tag/v0.65.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Eugeny/russh/releases/tag/v0.65.0"
                }
            ],
            "affected": [
                {
                    "vendor": "Eugeny",
                    "product": "russh",
                    "versions": [
                        {
                            "version": "< 0.65",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-28T17:06:57.542Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From 0.50.0-beta.12 until 0.65.0, the agent server's Connection::try_sign path in russh/src/keys/agent/server.rs recognizes SSH_AGENT_CONSTRAIN_CONFIRM but returns a hard-coded successful result instead of calling Agent::confirm. In applications that override Agent::confirm to require user approval or another policy check, a process that can reach the agent socket, including the remote side of a forwarded agent, can use a key added through ssh-add -c without that check and can authenticate or sign data as the user while the key remains loaded. The separate Agent::confirm_request hook still runs for every signing request, so checks implemented there remain effective, and implementations that retain the default always-successful Agent::confirm do not lose an approval check through this regression. This issue is fixed in version 0.65.0."
                }
            ],
            "source": {
                "advisory": "GHSA-vp5q-ff62-jwqv",
                "discovery": "UNKNOWN"
            }
        }
    }
}