High severity8.2NVD Advisory· Published Aug 4, 2026· Updated Sep 18, 2026
CVE-2026-70486
CVE-2026-70486
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, the terminal file-preview serveUrl iframe branch always granted allow-same-origin together with allow-scripts for HTML files served from the application origin. Any authenticated user with access to a configured terminal server could cause script in a previewed file to run in the Open WebUI origin, read the victim's session token from localStorage, and take over the account, with possible server-side code execution if the victim was an admin or held workspace.functions. This issue is fixed in 0.11.0.
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 | >= 0.9.0, < 0.11.0 | 0.11.0 |
Affected products
1- Range: 0.9.0 - 0.11.0
Patches
Vulnerability mechanics
References
5- github.com/open-webui/open-webui/commit/65a5fad7b97db99d490d81f4e0860282c3a4543cnvdPatchWEB
- github.com/open-webui/open-webui/pull/26907nvdPatchVendor AdvisoryWEB
- github.com/open-webui/open-webui/security/advisories/GHSA-3xpf-xq7r-v8c5nvdExploitPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-3xpf-xq7r-v8c5ghsaADVISORY
- github.com/open-webui/open-webui/releases/tag/v0.11.0nvdRelease NotesWEB
News mentions
1- Open WebUI: 17 Vulnerabilities Disclosed Together, Patched in 0.11.0Vypr Intelligence · Aug 4, 2026