CVE-2026-70482highCWE-287

CVE-2026-70482: high-severity vulnerability in open-webui

Open WebUI: Account takeover via OAuth token exchange accepting tokens issued to any client

Published · Updated

Follow this CVE+ Monitor open-webui+ Monitor open-webui

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.1epss 0.6%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Affected products
open-webui · open-webui
Related CVEs — open-webui

In the same product, most dangerous first.

CVE-2025-64496HIGHOpen WebUI Affected by an External Model Server (Direct Connections) Code Injection via SSE EventsEPSS 7.2%CVE-2026-34222HIGHOpen WebUI has Broken Access Control in Tool ValvesEPSS 5.1%CVE-2025-65958HIGHOpen WebUI vulnerable to Server-Side Request Forgery (SSRF) via Arbitrary URL Processing in /api/v1/retrieval/process/webEPSS 4.7%CVE-2026-28788HIGHOpen WebUI's process_files_batch() endpoint missing ownership check, allows unauthorized file overwriteEPSS 3.0%CVE-2026-44551CRITICALOpen WebUI: LDAP Empty Password Authentication BypassEPSS 1.5%CVE-2026-45397MEDIUMOpen WebUI: Unauthenticated RAG Configuration DisclosureEPSS 0.8%