Is CVE-2026-52853 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-52853 being exploited in the wild.

How severe is CVE-2026-52853?

Medium severity, with a CVSS score of 5.2, published 24 September 2026.

Is there a fix for CVE-2026-52853?

A patch was published on 2026-05-28: Fix released in version 0.90.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-52853 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-52853?

Check whether you run Docmost at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-52853: Docmost privilege escalation in workspace invitation

CVE-2026-52853 · Severity: medium · CVSS 5.2 · Published 2026-09-24

Docmost is an open-source collaborative wiki and documentation platform. An authenticated administrator can exploit a flaw in the workspace invitation system to grant OWNER-level privileges to external users, even though admins should not be able to grant permissions beyond their own role. This allows attackers with admin access to create backdoor accounts with the highest privilege level in a workspace.

Technologies: Docmost. Vendors: Docmost.

Quick answers

Is CVE-2026-52853 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-52853 being exploited in the wild.
How severe is CVE-2026-52853?: Medium severity, with a CVSS score of 5.2, published 24 September 2026.
Which products and versions are affected?: Docmost prior to 0.90.1.
Is there a fix for CVE-2026-52853?: A patch was published on 2026-05-28: Fix released in version 0.90.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-52853 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-52853?: Check whether you run Docmost at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a privilege escalation due to missing role ceiling validation in the workspace invitation flow. An authenticated ADMIN user can invite external accounts and assign them the OWNER role, bypassing authorization checks that should prevent users from granting privileges above their own. The attacker gains full OWNER-level control over the workspace. The issue is fixed in version 0.90.1.

Affected products

Docmost Docmost prior to 0.90.1

Timeline

2026-09-24: disclosed
2026-05-28: patched: Fix released in version 0.90.1

References

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