open-webui Open WebUI up to 0.9.5 access control

Summaryinfo

A vulnerability, which was classified as critical, was found in open-webui Open WebUI. This vulnerability affects unknown code. Such manipulation leads to access control. This vulnerability is traded as CVE-2026-54012. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in open-webui Open WebUI. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI lets a user who can create, update, or import workspace models store arbitrary meta.knowledge entries on their model without checking whether they own or can read the referenced files. Open WebUI then treats meta.knowledge entries of type file as an authorization source in two places: the built-in view_file tool reads the file's extracted text, and has_access_to_file()'s model branch authorizes the file content and file delete endpoints. A malicious model owner can therefore attach another user's file ID to their model metadata and read or delete that private file. This vulnerability is fixed in 0.9.6.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-54012. The exploitation is known to be difficult. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 0.9.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38530). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• open-webui

Name

• Open WebUI

Version

• 0.1.124
• 0.3.16
• 0.5.7
• 0.5.11
• 0.6.5
• 0.6.10
• 0.6.19
• 0.6.31
• 0.6.35
• 0.6.37
• 0.6.44
• 0.7.0
• 0.8.0
• 0.8.6
• 0.8.9
• 0.8.11
• 0.8.12
• 0.9.0
• 0.9.3
• 0.9.5

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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