CVE-2026-34213

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.

CVSS v3.1

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

EPSS

0.22% chance of exploitation in the next 30 days, 12th percentile

Published

2026-04-14

Updated

2026-04-15

Proof-of-concept exploits (1)

• 0xmrma/CVE-2026-342130★ · 2026-06-26

References

• CVE Record
• NVD entry

Related

• CVE-2026-14361
• CVE-2026-32722
• CVE-2026-33146
• CVE-2026-33936
• CVE-2026-34048
• CVE-2026-34207