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CVE-2026-117505— a2aproject a2a-java ChildQueue queue.offer resource consumption

Quick assessment

Affected

a2aproject a2a-java

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 a2aproject 的 a2a-java 项目（版本 1.2.0.Final 及以下）中发现了一个安全漏洞。受影响组件为 ChildQueue，其 queue.offer 函数存在缺陷。攻击者可通过远程操纵该函数，导致资源耗尽。升级至版本 1.3.0.Final 即可修复此问题，相关补丁提交哈希为 be663f806efcfdddd2805d214fae4998379ac5f2。建议尽快升级受影响的组件。

CVSS 4.3 · Medium Updated Oct 27, 2026

Possible ATT&CK Techniques 2 AI

T1499.003 · Application Exhaustion Flood T1499 · Endpoint Denial of Service

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Vulnerability Information

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Vulnerability Title

a2aproject a2a-java ChildQueue queue.offer resource consumption

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

未加控制的资源消耗(资源穷尽)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
a2aproject	a2a-java	1.2.0.Final	`cpe:2.3:a:a2aproject:a2a-java::::::::`

II. Public POCs for CVE-2026-117505

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-117505

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Vendor Pages for CVE-2026-117505 (2)

Other References for CVE-2026-117505 (6)

https://github.com/a2aproject/a2a-java/commit/be663f806efcfdddd2805d214fae4998379ac5f2 patch
https://github.com/a2aproject/a2a-java/pull/1040 issue-tracking patch
https://vuldb.com/cve/CVE-2026-117505 third-party-advisory
https://vuldb.com/vuln/427072/cti signature permissions-required
https://vuldb.com/submit/1015054 third-party-advisory
https://vuldb.com/vuln/427072 vdb-entry technical-description

https://www.cve.org/CVERecord?id=CVE-2026-117505

Same Patch Batch · a2aproject · 2026-10-27 · 5 CVEs total

CVE-2026-117507	5.4 MEDIUM	a2aproject a2a-java TaskManager.saveTaskEvent race condition
CVE-2026-117503	5.3 MEDIUM	a2aproject a2a-go REST SSE handler rest.go resource consumption
CVE-2026-117504	5.3 MEDIUM	a2aproject a2a-go Distributed Manager distributed_manager.go Cancel denial of service
CVE-2026-117506	4.3 MEDIUM	a2aproject a2a-java Push Notification Config Store JpaDatabasePushNotificationConfigStore.

IV. Related Vulnerabilities

Same product: a2a-java

Same vendor: a2aproject

Same weakness: CWE-400