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CVE-2026-45402

🗓️ 15 May 2026 20:40:04Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 65 Views🌐 WEB

CVE-2026-45402: Unchecked file_id enables cross-user access and potential overwrite via folder and knowledge endpoints.

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Detection
Affected
Refs
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NVD
Vulners
Node
[
  {
    "vendor": "open-webui",
    "product": "open-webui",
    "versions": [
      {
        "version": "< 0.9.5",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
file_idrequest body/api/v1/folders/{id}/updateThe endpoint allows a user to attach a file to a folder by providing a file_id. It fails to verify if the user has permission to access the file associated with the provided file_id, leading to unauthorized file access.CWE-639
file_idrequest body/api/v1/knowledge/add_file_to_knowledge_by_idThe endpoint allows a user to add a file to a knowledge base by providing a file_id. It fails to verify if the user has permission to access the file associated with the provided file_id, leading to unauthorized file access.CWE-639
file_idsrequest body/api/v1/knowledge/add_files_to_knowledge_by_id_batchThe endpoint allows a user to add multiple files to a knowledge base by providing a list of file_ids. It fails to verify if the user has permission to access the files associated with the provided IDs, leading to unauthorized file access.CWE-639

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17 Jun 2026 10:52Current
7.2High risk
Vulners AI Score7.2
CVSS 3.18.1
EPSS0.00346
SSVC
65