RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution_CVE-2026-41179

{
    "lastseen": "",
    "description": "Rclone is a command-line program to sync files and directories to and from different cloud storage providers. Starting in version 1.48.0 and prior to version 1.73.5, the RC endpoint `operations/fsinfo` is exposed without `AuthRequired: true` and accepts attacker-controlled `fs` input. Because `rc.GetFs(...)` supports inline backend definitions, an unauthenticated attacker can instantiate an attacker-controlled backend on demand. For the WebDAV backend, `bearer_token_command` is executed during backend initialization, making single-request unauthenticated local command execution possible on reachable RC deployments without global HTTP authentication. Version 1.73.5 patches the issue.",
    "published": "2026-04-23T00:03:36.282Z",
    "modified": "2026-04-23T00:03:36.282Z",
    "type": "cve",
    "title": "RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution",
    "source": "GitHub_M",
    "references": "https://github.com/rclone/rclone/security/advisories/GHSA-jfwf-28xr-xw6q\nhttps://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/backend/webdav/webdav.go\nhttps://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/operations/rc.go\nhttps://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/cache.go",
    "id": "CVE-2026-41179",
    "bulletinFamily": "",
    "cwe": [
        "CWE-78",
        "CWE-306"
    ],
    "cvelist": null,
    "sourceData": "rclone rclone >= 1.48.0, < 1.73.5",
    "sourceHref": "",
    "cvss": {
        "score": 9.2,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "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": "rclone",
    "version": ">= 1.48.0, < 1.73.5",
    "vendor": "rclone",
    "ai_description": "Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution in Rclone versions 1.48.0 to 1.73.5",
    "ai_severity": "Critical",
    "ai_vendor": "Rclone",
    "ai_product": "Rclone",
    "ai_version": "1.48.0 to 1.73.5",
    "ai_score": 9.2
}