Summary
generated automatically from NVD dataCollabora Online Built-in CODE Server (richdocumentscode), a Nextcloud app, has an OS command injection flaw (CWE-78) in proxy.php that can lead to remote code execution. It is triggered when the CODE server isn't running, for example after a recent restart, and affects versions before 26.4.303. Standalone Collabora Online servers are not affected, and the flaw is listed in the CISA KEV catalog as exploited in the wild.
NVD description
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.
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-10-23. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-10-26
EPSS · FIRST.org
1.2%probability of exploitation in the next 30 days
Higher than 68% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-23, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
Information
- Published
- 14 oct. 2026
- Updated
- 24 oct. 2026
- Status
- Deferred
- Source
- cve@mitre.org
Weaknesses (CWE)
Similar CVEs
Other vulnerabilities of type CWE-78
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