CVE-2026-45397

🔶 medium

Summary

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 Score

5.3

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-15

First Seen: 2026-05-17

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 19.1% of all 356,676 vulnerabilities in our database.

#288,639

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 18, 2026

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2026-05-19

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-306

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
openwebui	open_webui	Affected	< 0.9.5

🔗 References 1

https://github.com/open-webui/open-webui/security/ad...

Exploit Mitigation Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-88000	🔶 medium	6.5	0.3	Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, DELETE /...	2026-09-09
CVE-2026-88001	🔶 medium	5.0	0.3	Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, server-si...	2026-09-09
CVE-2026-88002	🔶 medium	6.5	0.3	Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.1, the messa...	2026-09-09
CVE-2026-56398	⚠️ high	7.3	0.3	Open WebUI before 0.9.5 contains a stored cross-site scripting vulnerability in the OAuth authentication flow where the ...	2026-07-15
CVE-2026-56400	⚠️ high	8.3	0.3	open-webui before 0.3.14 contains a cross-origin resource sharing misconfiguration allowing arbitrary origins with allow...	2026-07-15
CVE-2026-59212	🔶 medium	5.4	0.3	Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, _verify_...	2026-07-09

These CVEs affect the same products