Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import_CVE-2026-43638

{
    "lastseen": "",
    "description": "Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.",
    "published": "2026-05-11T17:13:31.801Z",
    "modified": "2026-05-11T17:13:31.801Z",
    "type": "cve",
    "title": "Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import",
    "source": "VulnCheck",
    "references": "https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass\nhttps://github.com/bitwarden/server/releases/tag/v2026.4.1\nhttps://github.com/bitwarden/server/pull/7394\nhttps://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758\nhttps://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import",
    "id": "CVE-2026-43638",
    "bulletinFamily": "",
    "cwe": [
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "bitwarden server 0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/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
}