Collabora Online up to 24.04.17/25.04.10 Read-Only State Enforcement privileges management

Summaryinfo

A vulnerability labeled as problematic has been found in Collabora Online up to 24.04.17/25.04.10. Affected by this issue is some unknown functionality of the component Read-Only State Enforcement. Executing a manipulation can lead to privileges management. This vulnerability is handled as CVE-2026-46499. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Collabora Online up to 24.04.17/25.04.10. This vulnerability affects an unknown part of the component Read-Only State Enforcement. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect integrity. CVE summarizes:

Collabora Online is a collaborative online office suite based on LibreOffice technology. Prior to 24.04.18 and 25.04.11, several document operations delegated to `LibreOfficeKit` in the per-document kit process fail to enforce a session's read-only state. A read-only user, such as a viewer-role WOPI user, can send crafted `WebSocket` messages to execute document-mutating `UNO` commands and dialog operations despite the read-only interface. The changes can mislead co-viewers within the live session, or an authorized editor sharing the session can unknowingly save the modifications. The read-only attacker cannot save the document directly, and changes are discarded when the kit session ends unless an authorized editor saves them. This issue is fixed in versions 24.04.18 and 25.04.11.

The advisory is available at github.com. This vulnerability was named CVE-2026-46499 since 05/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 24.04.18 or 25.04.11 eliminates this vulnerability.

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Productinfo

Vendor

• Collabora

Name

• Online

Version

• 24.04.0
• 24.04.1
• 24.04.2
• 24.04.3
• 24.04.4
• 24.04.5
• 24.04.6
• 24.04.7
• 24.04.8
• 24.04.9
• 24.04.10
• 24.04.11
• 24.04.12
• 24.04.13
• 24.04.14
• 24.04.15
• 24.04.16
• 24.04.17
• 25.04.0
• 25.04.1
• 25.04.2
• 25.04.3
• 25.04.4
• 25.04.5
• 25.04.6
• 25.04.7
• 25.04.8
• 25.04.9
• 25.04.10

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