---
id: CVE-2026-92359
title: A security flaw has been discovered in ag-ui-protocol ag-ui 0.3.0
summary: >-
  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 manipu…
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'
cwe:
  - CWE-346
  - CWE-942
vendor: ag-ui-protocol
product: ag-ui
affected:
  - ag-ui 0.3.0
published: '2026-09-16'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T11:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92359'
references:
  - url: 'https://github.com/ag-ui-protocol/ag-ui/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/ag-ui-protocol/ag-ui/commit/9b143b9668fa52c2054ede9d34a45ac4b4401089
    label: cna@vuldb.com
  - url: 'https://github.com/ag-ui-protocol/ag-ui/issues/2433'
    label: cna@vuldb.com
  - url: 'https://github.com/ag-ui-protocol/ag-ui/pull/2492'
    label: cna@vuldb.com
  - url: >-
      https://github.com/ag-ui-protocol/ag-ui/releases/tag/AGUI.Abstractions%400.0.6
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-92359'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/934120'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/405445'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/405445/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
epss: 0.00274
epssPercentile: 0.17585
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-16T13:15:05.598960Z'
ingestedAt: '2026-09-16T12:55:21.876Z'
---

## Overview

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 AGUI.Abstractions@0.0.6 is sufficient to fix this issue. The patch is identified as 9b143b9668fa52c2054ede9d34a45ac4b4401089. It is suggested to upgrade the affected component.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.