CVE-2026-110623
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductPapermerge-core
PublishedOct 14, 2026
First seenOct 14, 2026
Weakness typeCWE-862Missing authorization
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| papermerge papermerge-core | v ≤ 3.5.3 | — |
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