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CVE-2026-28788

🗓️ 26 Mar 2026 23:38:20Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 35 Views🌐 WEB

Open WebUI pre-0.8.6 allows authenticated users to overwrite files via process_files_batch due to missing ownership checks.

Related
Detection
Affected
Refs
Paths
NVD
Vulners
Node
[
  {
    "vendor": "open-webui",
    "product": "open-webui",
    "versions": [
      {
        "version": "< 0.8.6",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
idsrequest body/api/v1/retrieval/process/files/batchEndpoint allows overwriting file contents without ownership checks, enabling privilege escalation from read to write.CWE-639
file_idsrequest body/api/v1/retrieval/process/files/batchEndpoint allows overwriting file contents without ownership checks, enabling privilege escalation from read to write.CWE-639
uuid_listrequest body/api/v1/retrieval/process/files/batchEndpoint allows overwriting file contents without ownership checks, enabling privilege escalation from read to write.CWE-639
filenamesrequest body/api/v1/retrieval/process/files/batchEndpoint allows overwriting file contents without ownership checks, enabling privilege escalation from read to write.CWE-639
idpath/api/v1/knowledge/{id}/filesEndpoint used to discover file UUIDs accessible to a user with read access, enabling attack surface for overwriting files via the batch endpoint.CWE-639

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17 Jun 2026 10:29Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.1
EPSS0.02858
SSVC
35