CVE-2026-110623
Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | papermerge |
| Product | papermerge-core |
| Published | Oct 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
papermerge / papermerge-core
0 ≤ 3.5.3
References
github.com: https://github.com/papermerge/papermerge-core/issues/1290 github.com: https://github.com/papermerge/papermerge-core/issues/1291 github.com: https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/shared_nodes/router.py#L78-L150 github.com: https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269 vulncheck.com: https://www.vulncheck.com/advisories/papermerge-core-through-3.5.3-missing-authorization-in-shared-nodes-api
Credits
lighthousekeeper1212 🔍 leediay153 from Viettel Post