Medium severity4.3NVD Advisory· Published Mar 27, 2026· Updated Jun 17, 2026
CVE-2026-28786
CVE-2026-28786
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
open-webuiPyPI | < 0.8.6 | 0.8.6 |
Affected products
3cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*range: <0.8.6
- (no CPE)range: < 0.8.6
Patches
Vulnerability mechanics
References
4- github.com/open-webui/open-webui/security/advisories/GHSA-vvxm-vxmr-624hnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-vvxm-vxmr-624hghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-28786ghsaADVISORY
- github.com/open-webui/open-webui/commit/387225eb8b3906909436004f84fff1b012e067d4ghsaWEB
News mentions
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