---
id: CVE-2026-118128
title: >-
  a2aproject a2a-js Task Status Update result_manager.ts
  ResultManager.applyStatusUpdate race condition
summary: >-
  A vulnerability has been found in a2aproject a2a-js up to 1.1.0. Impacted is
  the function ResultManager.applyStatusUpdate of the file
  src/server/result_manager.ts of the component Task Status Update Handler. Such
  manipulation leads to ra…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-362
vendor: a2aproject
product: a2a-js
affected:
  - a2a-js 1.0
  - a2a-js 1.1.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-28T15:54:30.660593Z'
published: '2026-10-27'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T16:12:56.611Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118128'
references:
  - url: 'https://vuldb.com/vuln/427455'
    label: >-
      VDB-427455 | a2aproject a2a-js Task Status Update result_manager.ts
      ResultManager.applyStatusUpdate race condition
  - url: 'https://vuldb.com/vuln/427455/cti'
    label: 'VDB-427455 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-118128'
    label: CVE-2026-118128 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1015057'
    label: 'Submit #1015057 | a2aproject a2a-js ≤ 1.1.0 CWE-362'
  - url: 'https://github.com/a2aproject/a2a-js/pull/636'
  - url: >-
      https://github.com/a2aproject/a2a-js/commit/7b87c9480bfa643f9d2b2eaf06988b3d3a95de25
  - url: 'https://github.com/a2aproject/a2a-js/releases/tag/v1.2.0'
  - url: 'https://github.com/a2aproject/a2a-js/'
tags:
  - cve.org
epss: 0.00358
epssPercentile: 0.29439
ingestedAt: '2026-10-27T22:58:58.461Z'
---

## Overview

A vulnerability has been found in a2aproject a2a-js up to 1.1.0. Impacted is the function ResultManager.applyStatusUpdate of the file src/server/result_manager.ts of the component Task Status Update Handler. Such manipulation leads to race condition. The attack may be launched remotely. Upgrading to version 1.2.0 is recommended to address this issue. The name of the patch is 7b87c9480bfa643f9d2b2eaf06988b3d3a95de25. It is recommended to upgrade the affected component.

## Affected

- `a2a-js 1.0`
- `a2a-js 1.1.0`

## Remediation

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