{"id":"CVE-2026-52853","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-52853","generatedAt":"2026-10-28T01:39:27.012Z","title":"When the invitation is accepted, the new account receives OWNER-level permissions, allowing the ADMIN to create a backdoor OWNER account or promote a colluding external user to the workspace's highest privilege level.","description":"Docmost is open-source collaborative wiki and documentation software. Prior to 0.90.1, an authenticated workspace ADMIN can use the workspace invitation flow to invite an external email address with the OWNER role because the role ceiling does not prevent ADMIN users from granting privileges above their own. When the invitation is accepted, the new account receives OWNER-level permissions, allowing the ADMIN to create a backdoor OWNER account or promote a colluding external user to the workspace's highest privilege level. This issue is fixed in version 0.90.1.","published":"2026-09-24T19:17:14.000Z","lastModified":"2026-10-05T16:17:14.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N"},"cwe":["CWE-269"],"affected":[],"epss":{"score":0.00207,"percentile":0.10758,"date":"2026-10-26","history":[{"date":"2026-09-25","score":0.00207,"percentile":0.09656}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-24T19:17:14.000Z","detail":{"score":"5.2","severity":"MEDIUM","publishedAt":"2026-09-24T19:17:14.100Z"},"summary":"New CVE, medium severity (CVSS 5.2)."}],"references":[{"url":"https://github.com/docmost/docmost/commit/33895b060790358869f54ae451c3848480b39503","source":"security-advisories@github.com"},{"url":"https://github.com/docmost/docmost/pull/2250","source":"security-advisories@github.com"},{"url":"https://github.com/docmost/docmost/releases/tag/v0.90.1","source":"security-advisories@github.com"},{"url":"https://github.com/docmost/docmost/security/advisories/GHSA-84fx-mvqx-p5gx","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52853","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."}