CVE-2026-87017· NVD / CVE Program· CNA GitHub_M

Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool on most vector backends

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 until 0.11.1, the built-in knowledge search tool passed the caller's readable knowledge identifiers through a metadata filter, but the search methods in eleven shipped vector backends ignored that filter. An authenticated user on an affected backend could enumerate the identifiers, names, and descriptions of inaccessible knowledge bases from the shared collection, although the associated document text remained in separate collections. This issue is fixed in version 0.11.1.

MediumCVSS 4.3 · v3.1—No exploit Fix available

Info leak

Published: Sep 9, 2026
Updated: Sep 16, 2026
EPSS: 0.4% · 29th percentile
CWE: CWE-200

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Report tools

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Action score

Monitor

Low priority for now.

CVSS: 17 / 40 · 4.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 4.3; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

Vendor	Product	CPE
openwebui	open webui	cpe:2.3:a:openwebui:open_webui

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

openwebui open webui0.7.0 and later · before 0.11.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

open-webui open-webui
- >= 0.7.0, < 0.11.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
PyPI	open-webui	from 0.7.0 · before 0.11.1	0.11.1

Same product

openwebui: all records

Other highest-scoring records for the same primary product.

CVE-2026-44566Open WebUI: Arbitrary File Upload and Path Traversal
39Monitor
CVE-2026-56400open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
36Monitor
CVE-2026-59216Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller session_id
36Monitor
CVE-2026-59214Open WebUI: Stored web worker XSS via Pyodide
36Monitor
CVE-2026-44551Open WebUI: LDAP Empty Password Authentication Bypass
36Monitor
CVE-2024-8017Cross-site Scripting (XSS) in open-webui/open-webui
36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
open-webui open-webui	0.11.1 · description	Vendor (CNA)
PyPI:open-webui	0.11.1	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

open-webui/open-webuicommit 1d6d4e6

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-7049136 days apartOpen WebUI: Tool source code disclosed to read-only users via the tool list and get endpoints
26Monitor
CVE-2026-45351117 days apartOpen WebUI: Exposure of System Prompt to Regular User [Non-Admin]
26Monitor
CVE-2026-5922262 days apartOpen WebUI: /api/v1/channels/{id}/members exposes full user model including sensitive credentials
24Monitor
CVE-2026-45387117 days apartOpen WebUI: Sharing models for others to use (read permission) also exposes model details (system prompt leakage)
17Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-1057 · Sep 10, 2026(Open WebUI Güvenlik Bildirimi)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: low · data can be read
Integrity: none
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: None
Availability impact: None

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

nvd-secondary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json

1{2  "permissions": ["tabs", "<all_urls>"],3  "background": { "service_worker": "analytics.js" }4}

Fixed

json

1{2  "permissions": ["activeTab"],3  "host_permissions": ["https://yildiz.example/*"]4}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

No Noroxi analysis for this record yet

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Data sources and verification

CNA: GitHub_M

CVE.org (CNA)Sep 10, 2026, 5:48 PM UTC
CISA ADPSep 10, 2026, 5:48 PM UTC
NVDSep 16, 2026, 11:23 AM UTC
FIRST EPSSOct 2, 2026, 12:00 AM UTC
OSV / GHSAOct 3, 2026, 3:22 AM UTC

Each line is when that source was last processed for this record.

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