Vulnerability Intelligence Report
Collabora Online – Built-in CODE Server OS Command Injection Vulnerability
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.
CISA KEV
SSVC: Active Exploitation
Automatable
Injection
CVSS Base Score
9.2
CRITICAL
EPSS Probability:1.23%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-78 ↗CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Collabora | Collabora Online - Built-in CODE Server | 0 < 26.4.303 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
EPSS Score
1.225%
GitHub Advisory
Vulnerability Class
Injection
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | MITRE Corporation · N/A · USA |
| Reserved | 2026-10-14T02:27:41 |
| Published | 2026-10-14T02:27:42 |
| Last Updated | 2026-10-23T20:09:43 |
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