Open WebUI: Forged chat-file link allows cross-user file read and deletion

{
  "id": "8569f74d39d2bfc05942a77b7640d295627d77af80282cf752b3be92d1c3f090",
  "url": "https://osv.dev/vulnerability/CVE-2026-54010",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open WebUI: Forged chat-file link allows cross-user file read and deletion",
    "summary": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI lets an authenticated user attach arbitrary file_id values to their own chat message without checking whether they own or can read those files. If the attacker then shares that chat and grants themselves read access, has_access_to_file() treats the victim file as accessible through the shared chat, and the file endpoints read or delete the victim file. This vulnerability is fixed in 0.9.6.",
    "evidence": "osv:CVE-2026-54010",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-54010",
      "aliases": [
        "CVE-2026-54010",
        "GHSA-vrhc-3fr6-pc3c",
        "PYSEC-2026-2763"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open-webui/open-webui",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1a97751e376e00a1897bc3679215ae1c7bd8fd42"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.9.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.9.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54010.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.084194430Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54010.json",
        "https://github.com/open-webui/open-webui/security/advisories/GHSA-vrhc-3fr6-pc3c",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54010"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-284",
          "CWE-639",
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54010.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54010",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491498,
  "published_at": "2026-06-23T16:48:22.266+00:00"
}