CVE-2026-45667 MEDIUM

CVE-2026-45667: Open WebUI: Unauthenticated endpoint can trigger embedding generation (cost/DoS)

Vendor Open-Webui

Product open-webui

Weakness CWE-862 · Missing authorization

Published May 15, 2026

Last update May 18, 2026

View on NVD All CVEs

CVSS base score

6.5/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality None

Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 15, 2026 CVE published

May 18, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-45667 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/862.html

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04Related CVE

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