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VULNERABILITIES

CVE-2026-87015 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/open-webui/open-webui/security/advisories/GHSA-p78m-89r6-pgf7 CISA-ADPExploitVendor Advisory
https://github.com/open-webui/open-webui/commit/cd9db21c5276807a2975ddba17cef369ad1114b7 [email protected]Patch
https://github.com/open-webui/open-webui/pull/28630 [email protected]Issue TrackingPatch
https://github.com/open-webui/open-webui/releases/tag/v0.11.1 [email protected]Release Notes
https://github.com/open-webui/open-webui/security/advisories/GHSA-p78m-89r6-pgf7 [email protected]ExploitVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-201Insertion of Sensitive Information Into Sent Data[email protected]

Affected Products

ProductVersions
openwebui open webui
>= 0.6.27, < 0.11.1

CPE

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

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-87015
NVD Published Date:
Sep 9, 2026
NVD Last Modified:
Sep 15, 2026
Source:
[email protected]