CVE-2026-52850
Docmost: Broken access control in transclusion lookup API leaks sync-block content across private spaces
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
Docmost is open-source collaborative wiki and documentation software. Prior to 0.90.1, an authenticated workspace member who does not belong to a private space can call the transclusion / sync-block lookup API with a known sourcePageId and transclusionId pair because the lookup does not enforce private space membership before resolving the source page. The API can return confidential sync-block content and source page metadata even though the normal page APIs deny access to the same page. This issue is fixed in version 0.90.1.
| CWE | CWE-639 CWE-862 |
| Vendor | docmost |
| Product | docmost |
| Published | Sep 24, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
docmost / docmost
< 0.90.1