CVE-2026-110447

CriticalCVSS 9.2/10Known exploited (CISA KEV)Last modified Oct 24, 2026

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.

Metrics

CVSS 4.0 9.2/10CVSS: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

Weakness enumeration

CWE-78

Affected software

VendorProductVersions
CollaboraCollabora Online - Built-in CODE Server< 26.4.303

References

Timeline

Published
Oct 14, 2026
Last modified
Oct 24, 2026
Added to CISA KEV
Oct 23, 2026
NVD status
Deferred

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