---
id: CVE-2026-110623
title: >-
  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
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:14:02.800'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110623'
references:
  - url: >-
      https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/shared_nodes/router.py#L78-L150
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269
    label: disclosure@vulncheck.com
  - url: 'https://github.com/papermerge/papermerge-core/issues/1290'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/papermerge/papermerge-core/issues/1291'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/papermerge-core-through-3.5.3-missing-authorization-in-shared-nodes-api
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-14T15:36:14.009Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.