CVE-2026-110623 Details
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.
A missing authorization vulnerability has been identified in the Papermerge Core application, affecting versions through 3.5.3. This vulnerability resides within the shared nodes API, where authenticated users can manipulate documents belonging to other users by providing arbitrary node UUIDs. Exploitation is possible by calling the POST /shared-nodes or PATCH /shared-nodes/access/{node_id} endpoints. This allows users to grant themselves any role, enabling them to read, modify, or delete documents from other users and revoke existing shares.
Users can update to Papermerge Core version 3.5.4 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 14, 2026CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/shared_nodes/router.py#L78-L150 | [email protected] | Source CodeVendor |
| https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269 | [email protected] | Source CodeVendor |
| https://github.com/papermerge/papermerge-core/issues/1290 | [email protected] | Issue TrackingTechnical DescriptionVendor |
| https://github.com/papermerge/papermerge-core/issues/1291 | [email protected] | Issue TrackingTechnical DescriptionVendor |
| https://www.vulncheck.com/advisories/papermerge-core-through-3.5.3-missing-authorization-in-shared-nodes-api | [email protected] | AdvisoryBundleVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Papermerge Core | <= 3.5.3 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 14, 2026 | New CVE Received | [email protected] |