CVE-2026-110447Collabora 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 vulnerabi…
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It affects Collabora Online - Built-in CODE Server. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 1.23%, higher than 68% of scored CVEs.
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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.
- CVSS
- 9.2 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-78
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 1.23% (percentile 68)
- Assigned by
- mitre
- NVD analysis
- Deferred
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Collabora Collabora Online - Built-in CODE Server collabora:online_built_in_code_server (from the name) | before 26.4.303 | CNA record |
References
- https://github.com/CollaboraOnline/richdocumentscode/issues/354issue-tracking
- https://help.nextcloud.com/t/to-collabora-built-in-user-update-asap/250516vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.