CVE-2026-110447KEV · due Oct 26CWE-78command-injection

Collabora Online – Built-in CODE Server OS Command Injection Vulnerability

published October 14, 2026

Patch now

The score understates this — it's already being exploited

CVSS calls it none at 9.2. It is confirmed in active exploitation. It sits in the 68.6th percentile for exploit probability.

2
days to CISA
deadline
CVSS
9.2
EPSS
1%
Percentile
68.6
In the wild
Confirmed
What it is

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.

The record
Technical detail
CVSS
9.2 · NONE
CVSS v4.0
9.2 · 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
EPSS
0.01225 · 68.6th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-10-14T07:17Z
KEV added
2026-10-23 · due 2026-10-26
References (2)
https://github.com/CollaboraOnline/richdocumentscode/issues/354 · [email protected]https://help.nextcloud.com/t/to-collabora-built-in-user-update-asap/250516 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 1%
    epss
  • 14 OCT 02:27Z
    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…
    cvelistv5
  • 14 OCT 02:27Z
    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…
    cvelistv5