CVE-2026-48073 Docmost: Page export can include restricted same-space attachments through forged attachmentId
Low-privileged users can read restricted attachments from other pages by forging attachment IDs during page export, bypassing direct download access controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-48073?
CVE-2026-48073 is a medium-severity missing authorization vulnerability in docmost, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Docmost is open-source collaborative wiki and documentation software. From 0.70.0 until 0.80.1, a low-privileged authenticated user who can edit an exportable page can embed a forged attachmentId that belongs to a restricted page in the same space. Exporting the attacker-controlled page with includeAttachments=true causes the page export flow to read the restricted attachment from storage and include it in the returned ZIP archive even though direct file download denies access. This issue is fixed in version 0.80.1.
Weakness: CWE-639
Which versions are affected by CVE-2026-48073?
How do I fix CVE-2026-48073?
No fix has been published for CVE-2026-48073 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-48073 being exploited?
There is no known exploitation of CVE-2026-48073 in the wild and no public exploit code.
Sources
Also known as GHSA-rxm9-xp9h-4c84.