CVE-2026-28786

MEDIUM

4.3

Description

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 to trigger a `FileNotFoundError` whose message — including the server's absolute `DATA_DIR` path — is returned verbatim in the HTTP 400 response body, confirming information disclosure on all default deployments. Version 0.8.6 patches the issue.

Details CVE

Score CVSS v3.14.3

SeveriteMEDIUM

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

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie3/27/2026

Derniere modification3/30/2026

Sourcenvd

Observations honeypot0

Produits affectes

openwebui:open_webui

Faiblesses (CWE)

CWE-22CWE-209

References

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

https://github.com/open-webui/open-webui/security/advisories/GHSA-vvxm-vxmr-624h(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlations IOC

Aucune correlation enregistree

This product uses data from the NVD API but is not endorsed or certified by the NVD.