CVE-2026-52853 Docmost: Privilege Escalation - ADMIN Can Invite Users as OWNER
An authenticated workspace admin can invite users with owner privileges, enabling privilege escalation and backdoor account creation in Docmost.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-52853?
CVE-2026-52853 is a medium-severity vulnerability in docmost, published on 24 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-269
Which versions are affected by CVE-2026-52853?
How do I fix CVE-2026-52853?
No fix has been published for CVE-2026-52853 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-52853 being exploited?
There is no known exploitation of CVE-2026-52853 in the wild and no public exploit code.
Sources
Also known as GHSA-84fx-mvqx-p5gx.