CVE-2026-23623
February 05, 2026
Collabora Online is a collaborative online office suite based on LibreOffice technology. Prior to Collabora Online Development Edition version 25.04.08.2 and prior to Collabora Online versions 23.05.20.1, 24.04.17.3, and 25.04.7.5, a user with view-only rights and no download privileges can obtain a local copy of a shared file. Although there are no corresponding buttons in the interface, pressing Ctrl+Shift+S initiates the file download process. This allows the user to bypass the access restrictions and leads to unauthorized data retrieval. This issue has been patched in Collabora Online Development Edition version 25.04.08.2 and Collabora Online versions 23.05.20.1, 24.04.17.3, and 25.04.7.5.
Affected Packages
https://github.com/CollaboraOnline/online.git (GITHUB):
Affected version(s) >=cp-23.05.0-1 <cp-23.05.20-1Fix Suggestion:
Update to version cp-23.05.20-1https://github.com/CollaboraOnline/online.git (GITHUB):
Affected version(s) >=cp-25.04.0-0 <cp-25.04.7-5Fix Suggestion:
Update to version cp-25.04.7-5https://github.com/CollaboraOnline/online.git (GITHUB):
Affected version(s) >=cp-24.04.1-1 <cp-24.04.17-3Fix Suggestion:
Update to version cp-24.04.17-3Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Authorization
EPSS
Base Score:
0.04
