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CVE-2026-110447

Quick assessment

Affected
Collabora Collabora Online - Built-in CODE Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Collabora Online 内置的 CODE 服务器（richdocumentscode，一款 Nextcloud 应用）在 26.4.303 版本之前存在远程代码执行漏洞。该漏洞已于 2026 年 9 月和 10 月在野外被实际利用，且与 CVE-2025-66208 为不同漏洞。此漏洞属于操作系统命令注入漏洞，发生于 proxy.php 中，当 CODE 服务器未运行时（例如产品刚重启后）可能被触发。该漏洞不存在于独立部署的 Collabora Online 服务器中，仅影响采用 CODE 服务器部署方式

CVSS 9.2 · Critical EPSS 1.23% · P68

Affected Version Matrix 1

VendorProduct Version RangeStatus
Collabora Collabora Online - Built-in CODE Server < 26.4.303 affected
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I. Basic Information for CVE-2026-110447

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Collabora Collabora Online - Built-in CODE Server 0 ~ 26.4.303 -

II. Public POCs for CVE-2026-110447

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III. Intelligence Information for CVE-2026-110447

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Other References for CVE-2026-110447 (2)

IV. Related Vulnerabilities

Same vendor: Collabora
Same weakness: CWE-78

V. Comments for CVE-2026-110447

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