Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint_CVE-2026-57520

{
    "lastseen": "",
    "description": "Bitwarden Server before 2026.5.0 contains a privilege escalation vulnerability that allows authenticated Custom users with ManageUsers permission to remove Admin accounts from an organization by exploiting a missing role hierarchy check in the bulk user-remove endpoint. Attackers can supply Admin organization-user IDs in a bulk DELETE request to bypass the guard enforced on the single-user removal path, effectively removing one or more Admin accounts from an organization.",
    "published": "2026-06-25T19:08:41.189Z",
    "modified": "2026-06-25T19:08:41.189Z",
    "type": "cve",
    "title": "Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint",
    "source": "VulnCheck",
    "references": "https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin\nhttps://github.com/bitwarden/server/releases/tag/v2026.5.0\nhttps://github.com/bitwarden/server/pull/7526\nhttps://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4\nhttps://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint",
    "id": "CVE-2026-57520",
    "bulletinFamily": "",
    "cwe": [
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "bitwarden server 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/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": "server",
    "version": "0",
    "vendor": "bitwarden",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}