# CVE-2026-54019: Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode

> Attackers can bypass access controls in Open WebUI's Milvus multitenancy mode to read unauthorized data via unescaped collection names.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Jun 2026
- **Updated:** 23 Jun 2026
- **Also known as:** GHSA-p5cp-r7rg-qpxc, PYSEC-2026-2750

## What is CVE-2026-54019?

CVE-2026-54019 is a medium-severity missing authorization vulnerability in Openwebui Open Webui, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI added collection-level ACL checks, but the patch can still be bypassed when Milvus multitenancy mode is enabled. The ACL allows unknown non-KB collection names as legacy/ephemeral collections. In Milvus multitenancy mode, that user-controlled collection name becomes a resource_id and is interpolated into a Milvus expression without escaping. This is caused by an incomplete fix for CVE-2026-44560 This vulnerability is fixed in 0.9.6.

Weakness: CWE-943 (Improper Neutralization of Special Elements in Data Query Logic), CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-54019?

3 open source packages ship an affected version, including open-webui. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `open-webui` | PyPI | All versions | 0.9.6 |
| `open-webui` | PyPI | All versions | 0.9.6 |
| `open-webui` | PyPI | All versions | 0.9.6 |

Products: Openwebui Open Webui.

## How do I fix CVE-2026-54019?

Upgrade open-webui to 0.9.6 or later.

## Is CVE-2026-54019 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54019 exists.

## Other vulnerabilities in Openwebui Open Webui

- [CVE-2026-44551](https://insights.sbomify.com/CVE-2026-44551/): Open WebUI: LDAP Empty Password Authentication Bypass (critical 9.1)
- [CVE-2026-56400](https://insights.sbomify.com/CVE-2026-56400/): open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation (critical 9.0)
- [CVE-2024-8017](https://insights.sbomify.com/CVE-2024-8017/): Cross-site Scripting (XSS) in open-webui/open-webui (critical 9.0)
- [CVE-2026-45672](https://insights.sbomify.com/CVE-2026-45672/): Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed (high 8.8)
- [CVE-2026-87995](https://insights.sbomify.com/CVE-2026-87995/): Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-54019 and fix it if it is affected.

What it is: CVE-2026-54019 is a medium-severity missing authorization vulnerability in Openwebui Open Webui, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54019 exists.

Affected packages and fixed versions:
- open-webui (PyPI): affected all versions; fixed in 0.9.6
- open-webui (PyPI): affected all versions; fixed in 0.9.6
- open-webui (PyPI): affected all versions; fixed in 0.9.6

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-54019/ (Markdown: https://insights.sbomify.com/CVE-2026-54019/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-54019
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54019
- OSV: https://osv.dev/vulnerability/CVE-2026-54019

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-54019/
Summaries are generated and may contain mistakes; the official description above is the record.