Is itCheck something

No. CVE-2026-110447

Nextcloud's built in Collabora editor can be taken over

Being used now

Yes. Attackers are using this right now.

People who self host Nextcloud with the built in Collabora Online CODE server.

What to do

Update Collabora Online and Nextcloud to the latest versions.

Confirmed in attacksOct 23, 2026
ProductCollabora Online – Built-in CODE Server
GitHub repos4
Attack likelihood, next 30 days73%

Attack likelihood is EPSS, a daily estimate from FIRST.org of how likely this bug is to be used in attacks in the next 30 days.

The official description

Collabora Collabora Online – Built-in CODE Server when used within the NextCloud platform contains an OS command injection vulnerability that allows for remote code execution when the CODE server isn't running.

For your tech helper or AI assistant

A read-only checklist. Paste it into Claude, ChatGPT or a coding agent; it only looks and changes nothing.

Read-only check, change nothing, send nothing anywhere.
Is Collabora Collabora Online – Built-in CODE Server (CVE-2026-110447) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-110447. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.
Download playbook (.md)

Code on GitHub

Repos named after this bug. Some are scanners or write-ups, some are working attack code. Do not run them on a machine you care about.

Sources