⚠ Exploited in the wild. CISA added CVE-2026-110447 to its Known Exploited Vulnerabilities catalog on Oct 23, 2026, with a federal patch deadline of Oct 26, 2026 — meaning attackers are actively using it. If you run the affected software, patch it immediately.
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.
Details
AffectedCollabora · Collabora Online – Built-in CODE Server
Yes — CISA lists CVE-2026-110447 in its Known Exploited Vulnerabilities (KEV) catalog, so it is confirmed exploited in the wild. Patch it as a priority.
Apply the vendor’s patch for the affected software. The federal patch deadline was Oct 26, 2026. Then check whether your personal data was exposed in any related breach.
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