CVE-2026-87015
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 until 0.11.1, backend/open_webui/utils/tools.py captured a cookie jar from the enclosing connection loop instead of binding it to each external tool callable. When multiple tool servers were attached and a session or system OAuth connection was processed last, a request to a different server configured for bearer authentication could include the calling user's Open WebUI session cookies, allowing that server's operator to reuse the session and take over the account. This issue is fixed in version 0.11.1.
How to fix
- openwebui open_webui0.11.1 or later
- open-webui0.11.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openwebui open_webui | 0.6.27 ≤ v < 0.11.1 | 0.11.1 |
| open-webuiPyPI | 0.6.27 ≤ v < 0.11.1 | 0.11.1 |
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Attack Surface Management
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