Nextcloud: Files drop share links for end-to-end encrypted folders allowed to drop files into other folders of the share owner_CVE-2026-45159

{
    "lastseen": "",
    "description": "Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.",
    "published": "2026-06-01T16:39:38.836Z",
    "modified": "2026-06-01T16:39:38.836Z",
    "type": "cve",
    "title": "Nextcloud: Files drop share links for end-to-end encrypted folders allowed to drop files into other folders of the share owner",
    "source": "GitHub_M",
    "references": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7gwx-wg24\nhttps://github.com/nextcloud/end_to_end_encryption/pull/1395\nhttps://hackerone.com/reports/3304830",
    "id": "CVE-2026-45159",
    "bulletinFamily": "",
    "cwe": [
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "nextcloud security-advisories >= 1.15.0, < 1.15.4\nnextcloud security-advisories >= 1.16.0, < 1.16.3\nnextcloud security-advisories >= 1.17.0, < 1.17.1\nnextcloud security-advisories >= 1.18.0, < 1.18.1",
    "sourceHref": "",
    "cvss": {
        "score": 3.5,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "security-advisories",
    "version": ">= 1.15.0, < 1.15.4",
    "vendor": "nextcloud",
    "ai_description": "",
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    "ai_score": 0
}