CVE-2026-45667 Open WebUI: Unauthenticated endpoint can trigger embedding generation (cost/DoS)
Unauthenticated users can trigger embedding generation, causing denial of service or financial cost exposure in Open WebUI.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45667?
CVE-2026-45667 is a medium-severity missing authorization vulnerability in Openwebui Open Webui, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, GET /api/v1/memories/ef is accessible without authentication and executes request.app.state.EMBEDDING_FUNCTION(...). This allows any unauthenticated caller to trigger embedding generation which can lead to direct cost exposure if a paid provider is used. This vulnerability is fixed in 0.8.0.
Weakness: CWE-862
Which versions are affected by CVE-2026-45667?
3 open source packages ship an affected version, including open-webui. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
open-webui PyPI | All versions | 0.8.0 |
open-webui PyPI | All versions | 0.8.0 |
open-webui PyPI | All versions | 0.8.0 |
Products include Openwebui Open Webui.
How do I fix CVE-2026-45667?
Upgrade open-webui to 0.8.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-45667 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45667 exists.
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-m69w-p7m4-585j, PYSEC-2026-2747.