Authorization Flaw in Docmost Open-Source Documentation Software
CVE-2026-52850

4.3MEDIUM

Key Information:

Vendor

Docmost

Status
Docmost
Vendor
CVE Published:
24 September 2026

What is CVE-2026-52850?

An authorization flaw in Docmost, an open-source collaborative wiki and documentation platform, allows authenticated workspace members without access to specific private spaces to exploit the transclusion / sync-block lookup API. By providing a known sourcePageId and transclusionId pair, attackers can gain access to confidential sync-block data and metadata related to source pages, despite restrictions present in other page access controls. This vulnerability has been addressed in version 0.90.1, which reinforces access controls to prevent unauthorized viewing of sensitive content.

Affected Version(s)

docmost < 0.90.1

References

https://github.com/docmost/docmost/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/docmost/docmost/commit/830b5b4d458a130...
x_refsource_MISC
https://github.com/docmost/docmost/releases/tag/v0.90.1
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.