---
title: "CVE-2026-87998: Open WebUI - Broken Access Control"
description: "Open WebUI 0.10.0 to 0.11.1 contains a broken access control vulnerability caused by missing administrator checks in DELETE /api/v1/knowledge/{id}/delete, letting non-administrator users with write access delete shared external connections, exploit requires write access to one external knowledge base."
url: https://panop.io/threat-heartbeat/CVE-2026-87998/
---

# CVE-2026-87998 Open WebUI - Broken Access Control

Open WebUI 0.10.0 to 0.11.1 contains a broken access control vulnerability caused by missing administrator checks in DELETE /api/v1/knowledge/{id}/delete, letting non-administrator users with write access delete shared external connections, exploit requires write access to one external knowledge base.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Required

EPSS

0.49% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-87998)

## Details

Type

Broken Access Control

Impact

Denial Of Service, Broken Access Control

CVSS vector

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

Published

9 September 2026

Updated

15 October 2026

Weakness

[CWE-269](https://cwe.mitre.org/data/definitions/269.html)

## Vendor fix

Upgrade to version 0.11.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-87998](https://nvd.nist.gov/vuln/detail/CVE-2026-87998)
- [https://github.com/open-webui/open-webui/commit/dc03e7e595d61be97b25a1dd7bb99ad264f73199](https://github.com/open-webui/open-webui/commit/dc03e7e595d61be97b25a1dd7bb99ad264f73199)
- [https://github.com/open-webui/open-webui/pull/28113](https://github.com/open-webui/open-webui/pull/28113)
- [https://github.com/open-webui/open-webui/releases/tag/v0.11.1](https://github.com/open-webui/open-webui/releases/tag/v0.11.1)
- [https://github.com/open-webui/open-webui/security/advisories/GHSA-2724-6cpj-gf3v](https://github.com/open-webui/open-webui/security/advisories/GHSA-2724-6cpj-gf3v)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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