What is CVE-2026-28786?

CVE-2026-28786 is a medium-severity vulnerability in Open-webui, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-03-26.

How severe is CVE-2026-28786?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Path Traversal in Open-webui

CVE-2026-28786

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user t…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (11.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Open-webui — versions < 0.8.6

Weakness classification (CWE)

CWE-22 — Path Traversal
CWE-209 — Generation of Error Message Containing Sensitive Information

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-vvxm-vxmr-624h (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-28786?: CVE-2026-28786 is a medium-severity vulnerability in Open-webui, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-03-26.
How severe is CVE-2026-28786?: Medium severity. CVSS v3 base score is 4.3 out of 10.