What is CVE-2026-45397?

CVE-2026-45397 is a medium-severity vulnerability in Open-webui, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-05-15.

How severe is CVE-2026-45397?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Open-webui

CVE-2026-45397

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, GET /api/v1/retrieval/ returns live RAG pipeline configuration to any unauthenticated HTTP client. No Authorization header…

Vulnerability class: Broken Authentication

EPSS: 0.011 (78.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Open-webui — versions < 0.9.5
Openwebui Open_webui

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-45397?: CVE-2026-45397 is a medium-severity vulnerability in Open-webui, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-05-15.
How severe is CVE-2026-45397?: Medium severity. CVSS v3 base score is 5.3 out of 10.