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The vulnerability of the _validate_collection_access() function in the Open WebUI AI-based web interface allows a perpetrator to gain unauthorized access to protected information.
🗓️ 22 May 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 2 Views
| Reporter | Title | Published | Views | Family All 16 |
|---|---|---|---|---|
 | CVE-2026-45398 | 15 May 202620:35 | – | attackerkb |
 | CVE-2026-45398 | 10 May 202619:36 | – | circl |
 | Open WebUI 安全漏洞 | 15 May 202600:00 | – | cnnvd |
 | CVE-2026-45398 | 15 May 202620:35 | – | cve |
 | CVE-2026-45398 Open WebUI: IDOR - Retrieval API Bypasses Knowledge Base Access Controls | 15 May 202620:35 | – | cvelist |
 | EUVD-2026-30634 | 15 May 202620:35 | – | euvd |
 | Open WebUI Vulnerable to IDOR: Retrieval API Bypasses Knowledge Base Access Controls | 14 May 202620:26 | – | github |
 | CVE-2026-45398 | 15 May 202621:16 | – | nvd |
 | Open WebUI < 0.9.5 Multiple Vulnerabilities | 15 May 202600:00 | – | nessus |
 | GHSA-4G37-7P2C-38R9 Open WebUI Vulnerable to IDOR: Retrieval API Bypasses Knowledge Base Access Controls | 14 May 202620:26 | – | osv |
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22 May 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 27.1
CVSS 37.5
EPSS0.00331