Vulnerability Report

CVE-2026-110447

RCE CISA KEV Active

Title: CVE-2026-110447

RCE

Proof Of Concept

PoC Available for CVE-2026-110447

CWE Category CWE-78

Published Date Oct 14, 2026

Modified Date Oct 26, 2026

Exploit Status Available

Score 9.2 CVSS v4.0

Exploit Probability (EPSS)

12.33%

Vulnerability Summary

CVE-2026-110447: 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.

Impacted Vendors

Analysis in Progress...

Reference Links

https://github.com/CollaboraOnline/richdocumentscode/issues/354 https://help.nextcloud.com/t/to-collabora-built-in-user-update-asap/250516

CVSS v4.0

Source Entity [email protected]

Severity CRITICAL

9.2

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Associated Attack Patterns (CAPEC)

Total: Patterns