Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API

{
  "id": "95bd3eb143936d037a1bd01806f5de13f837aad51eb946777e964e06625aff43",
  "url": "https://osv.dev/vulnerability/CVE-2026-110623",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API",
    "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 or PATCH /shared-nodes/access/{node_id} to grant themselves any role, then read, modify, or delete victims' documents and revoke existing shares.",
    "evidence": "osv:CVE-2026-110623",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-110623",
      "aliases": [
        "CVE-2026-110623"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/papermerge/papermerge-core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0fd469102b05b5ebeb5ee39b3f73ff76991ab269"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.5.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0fd469102b05b5ebeb5ee39b3f73ff76991ab269"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.6.0a15",
            "3.6.0a14",
            "3.6.0a13",
            "3.6.0a5",
            "3.5.3",
            "3.5.2",
            "3.5.1",
            "3.5",
            "3.4.1",
            "3.4",
            "3.3.1",
            "3.3.0",
            "3.3",
            "3.2.0",
            "3.2",
            "3.1",
            "3.0.3",
            "3.0.2",
            "3.0.1",
            "3.0.0",
            "3.0",
            "2.1.9",
            "v2.1.9",
            "v2.1.8",
            "v2.1.7",
            "v2.1.5",
            "v2.1.1",
            "v2.1.0",
            "v2.1.0b5",
            "v2.1.0b3",
            "v2.1.0b1",
            "v2.0.1",
            "v2.0.0",
            "v2.0.0rc48",
            "v2.0.0rc47"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110623.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.349578281Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110623.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-110623",
        "https://www.vulncheck.com/advisories/papermerge-core-through-3.5.3-missing-authorization-in-shared-nodes-api",
        "https://github.com/papermerge/papermerge-core/issues/1290",
        "https://github.com/papermerge/papermerge-core/issues/1291",
        "https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269",
        "https://github.com/papermerge/papermerge-core",
        "https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/shared_nodes/router.py#L78-L150"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110623.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-110623",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522341,
  "published_at": "2026-10-14T14:16:59.957+00:00"
}