---
id: "CVE-2026-110447"
kind: "vulnerability"
aliases: ["CVE-2026-110447"]
title: "Collabora CODE server in Nextcloud: command injection enables remote code execution"
severity: "critical"
cvss: 9.2
epss: 0.01225
exploited: true
status: "open"
category: "package"
products: [{"name": "Collabora Collabora Online \u2013 Built-in CODE Server", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["collabora", "exploited", "nextcloud", "package", "richdocumentscode", "self-hosted"]
not_affected_if: ["no-richdocumentscode-app"]
published_at: "2026-10-14T03:17:20+00:00"
first_seen_at: "2026-10-24T00:09:50+00:00"
updated_at: "2026-10-25T02:58:18+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-110447", "first_seen_at": "2026-10-24T00:09:50+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110447", "first_seen_at": "2026-10-24T00:11:00+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-110447", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# Collabora CODE server in Nextcloud: command injection enables remote code execution

The built-in CODE server used by the Nextcloud richdocumentscode app contains an OS command injection flaw. When the CODE server is not running, a remote attacker can execute commands on the host.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Collabora Collabora Online – Built-in CODE Server affected ? fixed ?

## How to check

- Check whether the Nextcloud richdocumentscode app is installed and which version it is, e.g. `occ app:list | grep richdocumentscode`
- Check whether the built-in CODE server is in use, e.g. `unknown`

## Fix

- Update the richdocumentscode app (Collabora Online Built-in CODE Server) to `26.4.303` or later
- Follow CISA BOD 26-04 guidance and vendor instructions for mitigations; the sources give no other steps

## Timeline

- 2026-10-24T00:09:50+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-110447
- 2026-10-24T00:11:00+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-110447
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-110447

## From the sources

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.

CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_