CVE-2026-92359 Details
Description
A security flaw has been discovered in ag-ui-protocol ag-ui 0.3.0. The affected element is the function create_strands_app of the file integrations/aws-strands/python/src/ag_ui_strands/utils.py of the component CORSMiddleware. The manipulation results in permissive cross-domain policy with untrusted domains. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. Upgrading to version [email protected] is sufficient to fix this issue. The patch is identified as 9b143b9668fa52c2054ede9d34a45ac4b4401089. It is suggested to upgrade the affected component.
A vulnerability in the AG-UI framework's AWS Strands integration, specifically in version 0.3.0, allows for a permissive cross-domain policy that could be exploited by untrusted domains. The issue arises in the 'create_strands_app' function, which by default enables wildcard CORS and does not authenticate the agent endpoint. This flaw could be exploited remotely, potentially leading to unauthorized access to agent interactions and consumption of LLM resources.
To address this vulnerability, update the AG-UI AWS Strands integration to version 0.0.6, which removes the default wildcard CORS configuration and adds authentication to the agent endpoint. After updating, ensure that the CORS settings are correctly configured for your application's needs.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 16, 2026CISA-ADP
Assessed Sep 16, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/ag-ui-protocol/ag-ui/ | [email protected] | Vendor |
| https://github.com/ag-ui-protocol/ag-ui/commit/9b143b9668fa52c2054ede9d34a45ac4b4401089 | [email protected] | Source CodeVendor |
| https://github.com/ag-ui-protocol/ag-ui/issues/2433 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/ag-ui-protocol/ag-ui/pull/2492 | [email protected] | Issue TrackingVendor |
| https://github.com/ag-ui-protocol/ag-ui/releases/tag/AGUI.Abstractions%400.0.6 | [email protected] | Release NotesVendor |
| https://vuldb.com/cve/CVE-2026-92359 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/934120 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/405445 | [email protected] | BundlePermission Required |
| https://vuldb.com/vuln/405445/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-346 | Origin Validation Error | [email protected] |
| CWE-942 | Permissive Cross-domain Policy with Untrusted Domains | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ag-ui-protocol/ag-ui | 0.3.0 (semver) |
CPE
Remediation
| |
| ag-ui-protocol/ag-ui-strands | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 23, 2026 | CVE Translated | [email protected] |
| Sep 16, 2026 | CVE Modified | CISA-ADP |
| Sep 16, 2026 | New CVE Received | [email protected] |