Missing Authorization in Open WebUI - #VU140762
Published: August 3, 2026
Vulnerability identifier: #VU140762
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to missing authorization in the chat completion, chat completed, and chat action endpoints and builtin knowledge tools when processing an inline model definition with attached knowledge metadata. A remote user can send a specially crafted chat request referencing another user's file id to disclose sensitive information.
Exploitation requires a valid session id, native function calling, and knowledge tools with the model's builtin_tools capability enabled. The attacker must already know the target file id.
Affected software
Open WebUI
Remediation
Install security update from vendor's website.
Open WebUI - update to 0.11.0