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Vulnerability Details CVE-2026-70482

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.0, when ENABLE_OAUTH_TOKEN_EXCHANGE=True, /oauth/{provider}/token/exchange accepts a raw provider access token and validates it by calling the provider userinfo endpoint without confirming which OAuth client the token was issued to. Anyone holding an access token minted for any client registered with the same provider could exchange it for an Open WebUI session as that token user, including applications the operator does not control and has never authorized. This issue is fixed in 0.11.0.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.005

EPSS Ranking 39.2%

CVSS Severity

CVSS v3 Score 8.1

References

Products affected by CVE-2026-70482

Openwebui » Open Webui » Version: 0.10.0

cpe:2.3:a:openwebui:open_webui:0.10.0
Openwebui » Open Webui » Version: 0.10.1

cpe:2.3:a:openwebui:open_webui:0.10.1
Openwebui » Open Webui » Version: 0.10.2

cpe:2.3:a:openwebui:open_webui:0.10.2
Openwebui » Open Webui » Version: 0.8.0

cpe:2.3:a:openwebui:open_webui:0.8.0
Openwebui » Open Webui » Version: 0.8.1

cpe:2.3:a:openwebui:open_webui:0.8.1
Openwebui » Open Webui » Version: 0.8.10

cpe:2.3:a:openwebui:open_webui:0.8.10
Openwebui » Open Webui » Version: 0.8.11

cpe:2.3:a:openwebui:open_webui:0.8.11
Openwebui » Open Webui » Version: 0.8.12

cpe:2.3:a:openwebui:open_webui:0.8.12
Openwebui » Open Webui » Version: 0.8.2

cpe:2.3:a:openwebui:open_webui:0.8.2
Openwebui » Open Webui » Version: 0.8.3

cpe:2.3:a:openwebui:open_webui:0.8.3
Openwebui » Open Webui » Version: 0.8.4

cpe:2.3:a:openwebui:open_webui:0.8.4
Openwebui » Open Webui » Version: 0.8.5

cpe:2.3:a:openwebui:open_webui:0.8.5
Openwebui » Open Webui » Version: 0.8.6

cpe:2.3:a:openwebui:open_webui:0.8.6
Openwebui » Open Webui » Version: 0.8.7

cpe:2.3:a:openwebui:open_webui:0.8.7
Openwebui » Open Webui » Version: 0.8.8

cpe:2.3:a:openwebui:open_webui:0.8.8
Openwebui » Open Webui » Version: 0.8.9

cpe:2.3:a:openwebui:open_webui:0.8.9
Openwebui » Open Webui » Version: 0.9.0

cpe:2.3:a:openwebui:open_webui:0.9.0
Openwebui » Open Webui » Version: 0.9.1

cpe:2.3:a:openwebui:open_webui:0.9.1
Openwebui » Open Webui » Version: 0.9.2

cpe:2.3:a:openwebui:open_webui:0.9.2
Openwebui » Open Webui » Version: 0.9.3

cpe:2.3:a:openwebui:open_webui:0.9.3
Openwebui » Open Webui » Version: 0.9.4

cpe:2.3:a:openwebui:open_webui:0.9.4
Openwebui » Open Webui » Version: 0.9.5

cpe:2.3:a:openwebui:open_webui:0.9.5
Openwebui » Open Webui » Version: 0.9.6

cpe:2.3:a:openwebui:open_webui:0.9.6

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Vulnerability Details CVE-2026-70482

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