github.com
https://github.com/open-webui/open-webui CVE-2026-70482
HIGH
Open WebUI: Account takeover via OAuth token exchange accepting tokens issued to any client
Record summary
CVE-2026-70482 has a selected CVSS score of 8.1 (high).
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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 5, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
open-webuiBrowse open-webui / open-webui | CVE List | >= 0.8.0, < 0.11.0 | affected |
open-webuiBrowse PyPI / open-webui | GitHub Advisory | 0.8.0 to < 0.11.0 · Fixed in 0.11.0 | affected |
References
5github.com
https://github.com/open-webui/open-webui/commit/b190dcf3caa00dc8b7b9c7312828298d9143f60d github.com
https://github.com/open-webui/open-webui/commit/c4332be71e6e9c314e8a13b9d2819a6932561630 github.com
https://github.com/open-webui/open-webui/releases/tag/v0.11.0 github.comConfirmation
https://github.com/open-webui/open-webui/security/advisories/GHSA-rq84-p6rr-vf89