Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning_CVE-2026-44592

{
    "lastseen": "",
    "description": "Gradient is a nix-based continuous integration system. In 1.1.0, when GRADIENT_DISCOVERABLE=true (the default, and the NixOS module default), anyone who can reach /proto can register as a worker without any credentials by sending a fresh, never-registered worker UUID. The resulting session has PeerAuth::Open, i.e. it sees jobs from every organisation, and can immediately NarPush/NarUploaded arbitrary store paths into nar_storage and the cached_path table. This vulnerability is fixed in 1.1.1.",
    "published": "2026-05-14T18:39:59.824Z",
    "modified": "2026-05-14T18:39:59.824Z",
    "type": "cve",
    "title": "Gradient: Unauthenticated worker on /proto \u2192 arbitrary NAR write / cache poisoning",
    "source": "GitHub_M",
    "references": "https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2",
    "id": "CVE-2026-44592",
    "bulletinFamily": "",
    "cwe": [
        "CWE-306",
        "CWE-345",
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "wavelens gradient 1.1.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.4,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/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": "",
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            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "gradient",
    "version": "1.1.0",
    "vendor": "wavelens",
    "ai_description": "Unauthenticated worker registration and arbitrary NAR write/cache poisoning vulnerability in Gradient 1.1.0",
    "ai_severity": "Critical",
    "ai_vendor": "wavelens",
    "ai_product": "Gradient",
    "ai_version": "1.1.0",
    "ai_score": 9.4
}