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.
Metrics
Affected Vendors & Products
References
History
Wed, 05 Aug 2026 14:30:00 +0000
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ssvc
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Tue, 04 Aug 2026 22:00:00 +0000
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| First Time appeared |
Open-webui
Open-webui open-webui |
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| Vendors & Products |
Open-webui
Open-webui open-webui |
Tue, 04 Aug 2026 20:15:00 +0000
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| Description | 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. | |
| Title | Open WebUI: Account takeover via OAuth token exchange accepting tokens issued to any client | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-08-04T19:51:58.168Z
Updated: 2026-08-06T03:55:22.402Z
Reserved: 2026-08-04T15:24:41.340Z
Link: CVE-2026-70482
Updated: 2026-08-05T13:53:16.929Z
Status : Received
Published: 2026-08-04T20:16:55.190
Modified: 2026-08-06T05:17:07.240
Link: CVE-2026-70482
No data.