CVE-2026-110447 Collabora Online - Command Injection

Collabora Online Built-in CODE Server before 26.4.303 contains a command injection caused by improper handling in proxy.php when the CODE server is not running, letting remote attackers execute OS commands, exploit requires CODE server to be stopped.

CVSS base score 9.2 /10
Critical
CISA KEV
Exploited in the wild
Public exploit
Proof of concept available
Authentication
Not required
EPSS
1.23% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS 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
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-78

Vendor fix

Upgrade to version 26.4.303 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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