---
id: CVE-2026-101101
title: A vulnerability has been found in ag-ui-protocol ag-ui up to 2026-09-07
summary: >-
  A vulnerability has been found in ag-ui-protocol ag-ui up to 2026-09-07. This
  issue affects the function JSON.parse of the file legacy/convert.ts of the
  component Middleware. The manipulation leads to uncaught exception. Remote
  exploitat…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-248
vendor: ag-ui-protocol
product: ag-ui
affected:
  - ag-ui 2026-09-07
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T21:03:44.987'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101101'
references:
  - url: 'https://github.com/ag-ui-protocol/ag-ui/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/ag-ui-protocol/ag-ui/commit/30f8c794d5b73df5c610153043db502b2cc106cc
    label: cna@vuldb.com
  - url: 'https://github.com/ag-ui-protocol/ag-ui/issues/2444'
    label: cna@vuldb.com
  - url: 'https://github.com/ag-ui-protocol/ag-ui/pull/2493'
    label: cna@vuldb.com
  - url: 'https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-101101'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/934981'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410976'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410976/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-28T18:13:26.343570Z'
ingestedAt: '2026-09-28T18:17:54.303Z'
---

## Overview

A vulnerability has been found in ag-ui-protocol ag-ui up to 2026-09-07. This issue affects the function JSON.parse of the file legacy/convert.ts of the component Middleware. The manipulation leads to uncaught exception. Remote exploitation of the attack is possible. Upgrading to version 2026-09-08 is capable of addressing this issue. The identifier of the patch is 30f8c794d5b73df5c610153043db502b2cc106cc. Upgrading the affected component is recommended.

## Remediation

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