CVE-2026-87017 Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool on most vector backends
Authenticated users can enumerate inaccessible knowledge base metadata due to ignored filters in vector backends, exposing sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-87017?
CVE-2026-87017 is a medium-severity vulnerability in Openwebui Open Webui, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-87017?
3 open source packages ship an affected version, including open-webui. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
open-webui PyPI | From 0.7.0 | 0.11.1 |
open-webui PyPI | From 0.7.0 | 0.11.1 |
open-webui PyPI | From 0.7.0 | 0.11.1 |
Products include Openwebui Open Webui.
How do I fix CVE-2026-87017?
Upgrade open-webui to 0.11.1 or later.
Is CVE-2026-87017 being exploited?
There is no known exploitation of CVE-2026-87017 in the wild and no public exploit code.
Other vulnerabilities in Openwebui Open Webui
- CVE-2026-44551 Open WebUI: LDAP Empty Password Authentication Bypass
- CVE-2026-56400 open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
- CVE-2024-8017 Cross-site Scripting (XSS) in open-webui/open-webui
- CVE-2026-45672 Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed
- CVE-2026-87995 Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin
Sources
Also known as GHSA-pcvc-8vrv-8q6w, PYSEC-2026-4125.