CVE-2026-110447
Collabora Online Built-in CODE Server before 26.4.303 (richdocumentscode), a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't running (e.g., the product was recently restarted). The vulnerability is not present in standalone Collabora Online servers; only this deployment with CODE Server is affected.
Am I affected?
Sign in and add the software you use to your watchlist: we check it against every new vulnerability.
CISA says: 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.
Show me how to fix itTimeline
- Published by NVD
- Added to CISA known exploited list
- Last updated by NVD
- First covered by RedTeamDaily
Affected products
| Product | Versions |
|---|---|
| Collabora Collabora Online - Built-In Code Server | up to before 26.4.303 |
Coverage
Sources: NVD and CISA known exploited vulnerabilities catalogue.