---
id: CVE-2026-92360
title: A weakness has been identified in ag-ui-protocol ag-ui 1.0
summary: >-
  A weakness has been identified in ag-ui-protocol ag-ui 1.0. The impacted
  element is the function prepareRunAgentInput of the file agent/agent.ts of the
  component Event Application Layer. This manipulation of the argument
  TEXT_MESSAGE_STA…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-345
  - CWE-346
vendor: ag-ui-protocol
product: ag-ui
affected:
  - ag-ui 1.0
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-2026-92360'
references:
  - url: 'https://github.com/ag-ui-protocol/ag-ui/'
    label: cna@vuldb.com
  - url: 'https://github.com/ag-ui-protocol/ag-ui/issues/2437'
    label: cna@vuldb.com
  - url: 'https://github.com/ag-ui-protocol/ag-ui/pull/2701'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-92360'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/934950'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/405446'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/405446/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
epss: 0.00208
epssPercentile: 0.09693
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T15:10:01.076643Z'
ingestedAt: '2026-09-16T12:55:21.863Z'
---

## Overview

A weakness has been identified in ag-ui-protocol ag-ui 1.0. The impacted element is the function prepareRunAgentInput of the file agent/agent.ts of the component Event Application Layer. This manipulation of the argument TEXT_MESSAGE_START causes origin validation error. Remote exploitation of the attack is possible. The pull request to fix this issue awaits acceptance.

## Remediation

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