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Vulnerability

CVE-2026-110447 — Collabora Online – Built-in CODE Server OS Command Injection Vulnerability

critical 9.2 Exploited in the wild 2 stories · 2 outlets

Official record (cve.org)NVDCVE watch

Impacted if

  • Collabora Online - Built-in CODE… < 26.4.303

OS command injection · over the network · no login

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 vulnerabil

CISA Known Exploited Vulnerabilities

Added on 2026-10-23, federal remediation due 2026-10-26. Collabora Collabora Online – Built-in CODE Server when used within the NextCloud platform contains an OS command injection vulnerability that allows for remote code execution when the CODE server isn't running.

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

First seen by AX-NEWS · latest story . Severity: NVD, or the CVE record while the NVD has not scored it. This product uses data from the NVD API but is not endorsed or certified by the NVD.

Coverage

  1. CISA Flags Two Actively Exploited Critical Flaws in Collabora Online and Arista VeloCloud
    INThe Hacker News Cybersecurity

    The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added two vulnerabilities impacting Collabora Online Built-in CODE Server and Arista VeloCloud Orchestrator (VCO) to its Known Exploited Vulnerabilities (KEV)…

  2. Hackers exploit Collabora RCE flaw to backdoor Nextcloud servers
    USBleepingComputer Cybersecurity

    Threat actors are exploiting a critical command execution flaw, now tracked as CVE-2026-110447, in the Collabora Online - Built-in CODE Server app (richdocumentscode) for Nextcloud. [...]