Is CVE-2026-110447 exploited in the wild?

Yes. CVE-2026-110447 is known to be exploited in the wild, first recorded on 23 October 2026. Treat it as urgent.

How severe is CVE-2026-110447?

Critical severity, published 14 October 2026.

Which products and versions are affected?

Collabora Online CODE Server (richdocumentscode) before 26.4.303.

Is there a fix for CVE-2026-110447?

Yes: fixed in 26.4.303. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-110447 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-110447?

Check whether you run Collabora Online – Built-In Code Server or Collabora Online CODE Server (richdocumentscode) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-110447: Collabora Online CODE Server OS command injection in proxy.php

CVE-2026-110447 · Severity: critical · Exploited in the wild · Published 2026-10-14

Collabora Online Built-in CODE Server is a document editing component for Nextcloud. A remote code execution vulnerability in proxy.php allows unauthenticated attackers to execute arbitrary OS commands when the CODE server is not running, leading to unauthorized system access and data compromise. The flaw was actively exploited in September and October 2026.

Vendors: Collabora.

Quick answers

Is CVE-2026-110447 exploited in the wild?: Yes. CVE-2026-110447 is known to be exploited in the wild, first recorded on 23 October 2026. Treat it as urgent.
How severe is CVE-2026-110447?: Critical severity, published 14 October 2026.
Which products and versions are affected?: Collabora Online CODE Server (richdocumentscode) before 26.4.303.
Is there a fix for CVE-2026-110447?: Yes: fixed in 26.4.303. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-110447 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-110447?: Check whether you run Collabora Online – Built-In Code Server or Collabora Online CODE Server (richdocumentscode) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 26.4.303

Technical details

The vulnerability is an OS command injection in proxy.php of the richdocumentscode Nextcloud app, triggered when the CODE server is offline or recently restarted. Attackers exploit path traversal and shell metacharacters to inject and execute arbitrary commands without authentication. A fix exists in version 26.4.303 and later; standalone Collabora Online servers are not affected, only this Nextcloud-bundled deployment.

Affected products

Collabora Online CODE Server (richdocumentscode) before 26.4.303

Timeline

2026-09-10: disclosed: Exploitation in the wild begins
2026-10-14: advisory: CVE-2026-110447 published

References

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