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CVE-2026-117507— a2aproject a2a-java TaskManager.saveTaskEvent race condition

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 组件（版本 1.2.0.Final 及更早版本）中发现了一个安全漏洞。该漏洞影响函数，攻击者可通过操纵该函数引发竞态条件（race condition）。攻击可远程发起。升级到 1.3.0.Final 版本可修复此问题。相关补丁的标识符为。建议立即升级受影响的组件。

CVSS 5.4 · Medium Updated Oct 27, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

Vendor	Product	Version Range	Status
a2aproject	a2a-java	`1.2.0.Final`	affected
		`1.3.0.Final`	unaffected

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Vulnerability Information

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Vulnerability Title

a2aproject a2a-java TaskManager.saveTaskEvent race condition

Source: CVE Program / CVE List V5

Vulnerability Description

A security vulnerability has been detected in a2aproject a2a-java up to 1.2.0.Final. This impacts the function TaskManager.saveTaskEvent. The manipulation leads to race condition. The attack may be initiated remotely. Upgrading to version 1.3.0.Final will fix this issue. The identifier of the patch is 6b8e1e085c35e970ef0048901cd25850e4791ec2. The affected component should be upgraded.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

使用共享资源的并发执行不恰当同步问题(竞争条件)

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-2026-117507

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-117507

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Vendor Pages for CVE-2026-117507 (2)

Other References for CVE-2026-117507 (6)

https://github.com/a2aproject/a2a-java/pull/1045 issue-tracking patch
https://github.com/a2aproject/a2a-java/commit/6b8e1e085c35e970ef0048901cd25850e4791ec2 patch
https://vuldb.com/cve/CVE-2026-117507 third-party-advisory
https://vuldb.com/vuln/427074/cti signature permissions-required
https://vuldb.com/submit/1015060 third-party-advisory
https://vuldb.com/vuln/427074 vdb-entry technical-description

https://www.cve.org/CVERecord?id=CVE-2026-117507

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

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-2026-117505	4.3 MEDIUM	a2aproject a2a-java ChildQueue queue.offer resource consumption
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-362