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.
Metrics
Affected Vendors & Products
References
History
Thu, 10 Sep 2026 14:30:00 +0000
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ssvc
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Thu, 10 Sep 2026 11:45:00 +0000
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Open-webui
Open-webui open-webui |
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| Vendors & Products |
Open-webui
Open-webui open-webui |
Wed, 09 Sep 2026 21:15:00 +0000
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| 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. | |
| Title | Open WebUI: A user's session cookies are sent to tool servers configured for bearer authentication | |
| Weaknesses | CWE-201 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-09T21:03:34.145Z
Updated: 2026-09-10T13:50:33.969Z
Reserved: 2026-09-08T16:44:23.783Z
Link: CVE-2026-87015
Updated: 2026-09-10T13:50:30.530Z
Status : Awaiting Analysis
Published: 2026-09-09T21:17:06.463
Modified: 2026-09-10T14:50:07.813
Link: CVE-2026-87015
No data.