What is CVE-2026-45396?

CVE-2026-45396 is a medium-severity vulnerability in Open-webui, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 5.4/10. Published 2026-05-15.

How severe is CVE-2026-45396?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Open-webui

CVE-2026-45396

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the POST /api/v1/evaluations/feedback endpoint in Open WebUI v0.9.2 is vulnerable to mass assignment via FeedbackForm, which…

Vulnerability class: Mass Assignment

EPSS: 0.000 (9.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Open-webui — versions < 0.9.5
Openwebui Open_webui

Weakness classification (CWE)

CWE-915 — Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

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

Frequently asked questions

What is CVE-2026-45396?: CVE-2026-45396 is a medium-severity vulnerability in Open-webui, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 5.4/10. Published 2026-05-15.
How severe is CVE-2026-45396?: Medium severity. CVSS v3 base score is 5.4 out of 10.