CVE-2026-87015

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.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/commit/cd9db21c5276807a2975ddba17cef369ad1114b7	Patch
https://github.com/open-webui/open-webui/pull/28630	Issue Tracking Patch
https://github.com/open-webui/open-webui/releases/tag/v0.11.1	Release Notes
https://github.com/open-webui/open-webui/security/advisories/GHSA-p78m-89r6-pgf7	Exploit Vendor Advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-p78m-89r6-pgf7	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-09 21:17

Updated : 2026-09-15 15:54

NVD link : CVE-2026-87015

Mitre link : CVE-2026-87015

CVE.ORG link : CVE-2026-87015

JSON object : View

Products Affected

openwebui

open_webui

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

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