CVE-2026-54021 Details
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, several direct, index-addressed Ollama proxy routes accept a caller-supplied url_idx path parameter and use it as a raw index into the admin-configured OLLAMA_BASE_URLS list. Access control on these routes validates only whether the user may use the requested model, never which backend the request is routed to. Any authenticated user can append an arbitrary url_idx to force their request onto an Ollama backend they were never authorized to reach, including internal, higher-privilege, or explicitly admin-disabled backends. This vulnerability is fixed in 0.9.6.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-54021
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.21 Probability of exploitation activity being observed over the next 30 days (11th percentile)
CVSS score for CVE-2026-54021
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
6.3 Medium
Products affected by CVE-2026-54021
Open Webui 0.3.15
Open Webui 0.3.30
Open Webui 0.3.32
Open Webui 0.3.35
Open Webui 0.4.7
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-54021 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 1,053 24.39%
DE 665 15.40%
CN 510 11.81%
GB 178 4.12%
FR 175 4.05%
RU 169 3.91%
SG 168 3.89%
KR 141 3.27%
JP 101 2.34%
NL 88 2.04%

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CVE-2026-54021 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 2,620 83.89%
Telecommunications 377 12.07%
Education 67 2.15%
Business Services 13 0.42%
Retail 10 0.32%
Engineering 8 0.26%
Media/Entertainment 7 0.22%
Government/Politics 7 0.22%
Utilities 6 0.19%
Energy/Resources 3 0.10%

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