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CVE-2026-70482
8.1 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): Required (R)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): Required (R)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): None (N)
Activity log
- Created suggestion
Open WebUI: Account takeover via OAuth token exchange accepting tokens issued to any client
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.
References
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https://github.com/open-webui/open-webui/security/advisories/GHSA-rq84-p6rr-vf89 x_refsource_CONFIRM
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https://github.com/open-webui/open-webui/releases/tag/v0.11.0 x_refsource_MISC
Affected products
open-webui
- ==>= 0.8.0, < 0.11.0
Package maintainers
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@shivaraj-bh Shivaraj B H <sbh69840@gmail.com>
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@codgician codgician <codgician@outlook.com>