{"id":"CVE-2026-45284","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-45284","generatedAt":"2026-10-28T10:35:43.654Z","title":"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.","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":"2026-06-01T19:16:51.000Z","lastModified":"2026-07-22T08:10:00.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-284"],"affected":["nextcloud/user oidc"],"epss":{"score":0.00193,"percentile":0.08932,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fm","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/nextcloud/user_oidc/pull/1340","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://hackerone.com/reports/3554696","tags":["Permissions Required"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45284","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}