CVE-2026-110385

Published Oct 14, 2026 CVSS 4.0 · 8.7 High EPSS 1.0% KEV · Not listed
Description
A remote code execution vulnerability in ONLYOFFICE Document Server versions before10.0.0 allows an authenticated attacker with a valid Inbox-compatible JWT to execute arbitrary operating system commands as the ds service account. The Document Builder API improperly processes user-controlled converter XML supplied through the optional third argument of builder.SaveFile(). By injecting a duplicate m_sFileTo element, an attacker can override the server-generated output path and write arbitrary content outside the designated job directory. This allows the attacker to overwrite the runtime.json configuration file, modify the Document Builder executable path and arguments, and execute arbitrary commands when a subsequent Document Builder job is processed.

Remediation

Vendor Solution

Update ONLYOFFICE Document Server to v.10 or newer

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Remote Code Execution via Builder.XML Path Overwrite in ONLYOFFICE Document Server
Type Values Removed Values Added
Title Remote Code Execution via Builder.XML Path Overwrite in ONLYOFFICE Document Server
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A remote code execution vulnerability in ONLYOFFICE Document Server versions before10.0.0 allows an authenticated attacker with a valid Inbox-compatible JWT to execute arbitrary operating system commands as the ds service account. The Document Builder API improperly processes user-controlled converter XML supplied through the optional third argument of builder.SaveFile(). By injecting a duplicate m_sFileTo element, an attacker can override the server-generated output path and write arbitrary content outside the designated job directory. This allows the attacker to overwrite the runtime.json configuration file, modify the Document Builder executable path and arguments, and execute arbitrary commands when a subsequent Document Builder job is processed.
First Time appeared Onlyoffice
Onlyoffice document Server
Weaknesses CWE-73
CPEs cpe:2.3:a:onlyoffice:document_server:*:*:*:*:*:*:*:*
Vendors & Products Onlyoffice
Onlyoffice document Server
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 14, 2026, 5:24 PM
Reserved
Oct 14, 2026, 12:24 AM
Status
Awaiting Analysis
Published
Oct 14, 2026, 1:17 AM
Modified
Oct 16, 2026, 7:55 PM