CVE-2026-110623 Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API
Authenticated attackers can share other users' documents by supplying arbitrary node UUIDs, allowing them to read, modify, or delete victims' files.
- 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-2026-110623?
CVE-2026-110623 is a high-severity missing authorization vulnerability in papermerge-core, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Papermerge Core through 3.5.3 contains a missing authorization vulnerability in the shared nodes API that allows authenticated users to share other users' documents by supplying arbitrary node UUIDs. Attackers can call POST /shared-nodes or PATCH /shared-nodes/access/{node_id} to grant themselves any role, then read, modify, or delete victims' documents and revoke existing shares.
Weakness: CWE-862
Which versions are affected by CVE-2026-110623?
How do I fix CVE-2026-110623?
No fix has been published for CVE-2026-110623 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-2026-110623 being exploited?
There is no known exploitation of CVE-2026-110623 in the wild and no public exploit code.
Sources
Also known as GHSA-w6cv-8rwh-jrfj.