Open WebUI 0.9.6 before 0.11.4 Information Disclosure via Unscoped Directory ID

{
  "id": "9712a4da2bdcb928a4c4ba3b98c297639d855346f2fb9d74316be1d00bc77617",
  "url": "https://osv.dev/vulnerability/CVE-2026-109287",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open WebUI 0.9.6 before 0.11.4 Information Disclosure via Unscoped Directory ID",
    "summary": "Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a supplied directory_id belongs to the requested knowledge base. Users with read access to any knowledge base can supply a retained foreign directory UUID to GET /api/v1/knowledge/{id}/files. The returned breadcrumbs expose folder names, owner user ids and knowledge base ids of that directory and all its ancestors.",
    "evidence": "osv:CVE-2026-109287",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-109287",
      "aliases": [
        "CVE-2026-109287",
        "GHSA-jx3w-3pqq-7f3w"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open-webui/open-webui",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1a97751e376e00a1897bc3679215ae1c7bd8fd42"
                },
                {
                  "fixed": "8bd8b4fac5e059578ac0c74b3c18d11139f88b7d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.9.6"
                      },
                      {
                        "fixed": "0.11.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0.9.6"
                      },
                      {
                        "fixed": "0.11.4"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109287.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.070784972Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109287.json",
        "https://github.com/open-webui/open-webui/security/advisories/GHSA-jx3w-3pqq-7f3w",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109287",
        "https://www.vulncheck.com/advisories/open-webui-0.9.6-before-0.11.4-information-disclosure-via-unscoped-directory-id"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639",
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109287.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109287",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521936,
  "published_at": "2026-10-12T16:04:49.037+00:00"
}