Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the POST /api/v1/retrieval/process/web endpoint accepts a user-supplied collectionname and an overwrite query parameter (default: True). It performs no authorization check on whether the calling user owns or has write access to the target collection. When overwrite=True, savedocstovectordb calls VECTORDBCLIENT.deletecollection() on the target collection before writing new content. This vulnerability is fixed in 0.9.0.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44554.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-862"
]
}{
"cpe": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "0.9.0"
}
],
"source": [
"AFFECTED_FIELD",
"CPE_RANGE"
]
}