CVE-2026-70491 Details
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. In 0.10.2 and earlier, the GET /api/v1/tools/, GET /api/v1/tools/list, and GET /api/v1/tools/id/{id} endpoints in backend/open_webui/routers/tools.py returned full Python tool source to authenticated non-admin read-only users. ToolResponse deliberately omitted source and specs, but ToolUserResponse permitted extra fields and handlers spread a full tool model dump into the response, re-admitting omitted fields. A non-admin with a read grant can obtain another user's server-side tool source, which commonly embeds hard-coded API keys, credentials, and internal service URLs. This issue is fixed in 0.11.0.
A vulnerability in Open WebUI versions through 0.10.2 allows authenticated non-admin users with read-only access to shared tools to access the full Python source code of those tools. This issue arises because the tool read endpoints inadvertently include source code in the response, despite the fact that source access is intended to be restricted to writers. The exposed source code can contain sensitive information such as API keys, credentials, and internal service URLs.
Users can upgrade to Open WebUI version 0.11.0, which addresses this vulnerability by removing the source code from the responses of the affected endpoints for users without write access.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/open-webui/open-webui/security/advisories/GHSA-3r7g-q6cg-q2vx | CISA-ADP | ExploitPatchVendor Advisory |
| https://github.com/open-webui/open-webui/commit/c05de13b4fca1ac8a17153782b46b3d0aacf491c | [email protected] | Patch |
| https://github.com/open-webui/open-webui/pull/27005 | [email protected] | PatchVendor Advisory |
| https://github.com/open-webui/open-webui/releases/tag/v0.11.0 | [email protected] | Release Notes |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-3r7g-q6cg-q2vx | [email protected] | ExploitPatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openwebui open webui | < 0.11.0 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 18, 2026 | Initial Analysis | [email protected] |
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 4, 2026 | New CVE Received | [email protected] |