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CVE PROGRAM SOURCE RECORD5.4 Medium

CVE-2026-34213

Docmost has cross-page attachment overwrite via flawed attachmentId overwrite validation

Description

Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

docmost docmost

  • >= 0.3.0, < 0.71.0affected

References