Nextcloud: Wrong condition in the User OIDC app’s LdapService allowed deleted LDAP users to authenticate_CVE-2026-45284

{
    "lastseen": "",
    "description": "Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This issue has been patched in version 8.4.0.",
    "published": "2026-06-01T16:57:56.210Z",
    "modified": "2026-06-01T16:57:56.210Z",
    "type": "cve",
    "title": "Nextcloud: Wrong condition in the User OIDC app's LdapService allowed deleted LDAP users to authenticate",
    "source": "GitHub_M",
    "references": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fm\nhttps://github.com/nextcloud/user_oidc/pull/1340\nhttps://hackerone.com/reports/3554696",
    "id": "CVE-2026-45284",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284"
    ],
    "cvelist": null,
    "sourceData": "nextcloud security-advisories >= 1.3.6, < 8.4.0",
    "sourceHref": "",
    "cvss": {
        "score": 4.6,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L",
        "version": "3.1"
    },
    "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": "security-advisories",
    "version": ">= 1.3.6, < 8.4.0",
    "vendor": "nextcloud",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}