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.

Affected

Collabora · Collabora Online - Built-in CODE Server

CVSS v4.0 MITRE

9.2 CRITICALCVSS: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

EPSS

1.23% chance of exploitation in the next 30 days, 68th percentile

Published

2026-10-14

Proof-of-concept exploits (1)

• adriyansyah-mf/cve-2026-110447

References

• CVE Record
• NVD entry

Related

• CVE-2022-29464
• CVE-2023-23752
• CVE-2026-41940
• CVE-2026-85046