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CVE-2026-45666

🔶 medium
🔍 Scan for this CVE
Summary

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the API /api/v1/notes/{note_id} endpoint lacks proper authorization checks, allowing authenticated users to retrieve notes belonging to other users by guessing or enumerating UUIDs. This results in unauthorized disclosure of potentially sensitive or private user data. This vulnerability is fixed in 0.8.11.

CVSS Score
6.5
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 46.5% of all 365,620 vulnerabilities in our database.

#195,439
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: May 18, 2026
🔍 Exploitation Status
Poc
Proof-of-concept available
⚙️ Automatable
NO
Requires human interaction
💥 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:L/UI:N/S:U/C:H/I:N/A:N
CWE IDs (Weakness Types)
CWE-639

📦 Affected Products 1

Vendor Product Status Affected Versions
openwebui open_webui Affected
< 0.8.11

🔗 References 1

https://github.com/open-webui/open-webui/security/ad...
Exploit Patch Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-88005 🔶 medium 6.5 0.4 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.9.0, Open WebUI... 2026-09-10
CVE-2026-88006 🔶 medium 6.5 0.4 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.1, Open WebU... 2026-09-10
CVE-2026-87011 ⚠️ high 7.5 0.4 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, the unaut... 2026-09-09
CVE-2026-87012 🔶 medium 4.3 0.3 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/o... 2026-09-09
CVE-2026-87013 🔶 medium 4.3 0.3 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /ap... 2026-09-09
CVE-2026-87014 🔶 medium 6.5 0.3 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, role sync... 2026-09-09
These CVEs affect the same products