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CVE-2026-110447

CriticalCVSS 9.2 / 10
Published Oct 14, 2026·Last modified Oct 15, 2026
Affected Components(113)
collaboraonline/richdocumentscode
4.2.602
collaboraonline/richdocumentscode
6.4.007
collaboraonline/richdocumentscode
23.5.602
1 / 38
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.

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Risk Scores
Base Score
9.2

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
9.2

Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.

EPSS
73.31%

The exploit probability is very high. The vulnerability is very likely to be exploited in the next 30 days.

Exploit
Attacked

This vulnerability is actively being exploited in the wild. Please take immediate action to mitigate the risk.

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