---
id: CVE-2026-117505
title: a2aproject a2a-java ChildQueue queue.offer resource consumption
summary: >-
  A security flaw has been discovered in a2aproject a2a-java up to 1.2.0.Final.
  The impacted element is the function queue.offer of the component ChildQueue.
  Performing a manipulation results in resource consumption. The attack can be
  init…
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/E:X/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-400
  - CWE-404
vendor: a2aproject
product: a2a-java
affected:
  - a2a-java 1.2.0.Final
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-28T14:33:54.373206Z'
published: '2026-10-27'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T16:16:24.531Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-117505'
references:
  - url: 'https://vuldb.com/vuln/427072'
    label: >-
      VDB-427072 | a2aproject a2a-java ChildQueue queue.offer resource
      consumption
  - url: 'https://vuldb.com/vuln/427072/cti'
    label: 'VDB-427072 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-117505'
    label: CVE-2026-117505 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1015054'
    label: 'Submit #1015054 | a2aproject a2a-java ≤ 1.2.0.Final CWE-400'
  - url: 'https://github.com/a2aproject/a2a-java/pull/1040'
  - url: >-
      https://github.com/a2aproject/a2a-java/commit/be663f806efcfdddd2805d214fae4998379ac5f2
  - url: 'https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final'
  - url: 'https://github.com/a2aproject/a2a-java/'
tags:
  - cve.org
epss: 0.0031
epssPercentile: 0.23755
ingestedAt: '2026-10-27T16:11:59.458Z'
---

## Overview

A security flaw has been discovered in a2aproject a2a-java up to 1.2.0.Final. The impacted element is the function queue.offer of the component ChildQueue. Performing a manipulation results in resource consumption. The attack can be initiated remotely. Upgrading to version 1.3.0.Final is sufficient to resolve this issue. The patch is named be663f806efcfdddd2805d214fae4998379ac5f2. It is advisable to upgrade the affected component.

## Affected

- `a2a-java 1.2.0.Final`

## Remediation

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