CVE-2026-54016Public exploitNetwork attack vector

Restricted file metadata disclosure via unchecked knowledge ID

Published Jun 23, 2026 · Updated Jun 23, 2026

Broken object authorization in Open WebUI before 0.9.6 allows remote authenticated users to enumerate restricted knowledge-base file metadata. The no-attached-knowledge branch of search_knowledge_files passes an attacker-supplied knowledge_id to Knowledges.search_files_by_id without checking ownership or AccessGrants read permission. Exploitation requires a valid account, a known target ID, native function calling, enabled builtin knowledge tools, and a selected model with no attached knowledge bases.

CVSS severity4.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken object authorization in Open WebUI before 0.9.6 allows remote authenticated users to enumerate restricted knowledge-base file metadata. The no-attached-knowledge branch of search_knowledge_files passes an attacker-supplied knowledge_id to Knowledges.search_files_by_id without checking ownership or AccessGrants read permission. Exploitation requires a valid account, a known target ID, native function calling, enabled builtin knowledge tools, and a selected model with no attached knowledge bases.

The record

CVE
CVE-2026-54016
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-639, T1083
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=< 0.9.6

Published CVSS scores

4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1083File and Directory Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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