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.
CVE-2026-110447
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-110447
Collabora Online - Built-in CODE Server
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/CollaboraOnline/richdocumentscode",
"vendor": "Collabora",
"product": "Collabora Online - Built-in CODE Server",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.4.303",
"versionType": "semver"
}
],
"packageName": "richdocumentscode",
"collectionURL": "https://apps.nextcloud.com",
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-110447
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #55794 · Revision 1
- Added to Heist Feed
- Publisher date