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CVE-2026-116479— a2aproject a2a-java JSON-RPC Error getMessage information exposure

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）中发现了一个漏洞。该漏洞影响 JSON-RPC 错误处理器中的 getMessage 函数。攻击者可通过操纵该函数，利用错误消息导致信息泄露。此攻击可远程发起。升级至 1.3.0.Final 版本可修复此问题。补丁名称为：bbee3369f3825d0fba2373d821f6dc6d4fc82ec0。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

T1069 · Permission Groups Discovery T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

a2aproject a2a-java JSON-RPC Error getMessage information exposure

Source: CVE Program / CVE List V5

Vulnerability Description

A flaw has been found in a2aproject a2a-java up to 1.2.0.Final. This impacts the function getMessage of the component JSON-RPC Error Handler. This manipulation causes information exposure through error message. The attack can be initiated remotely. Upgrading to version 1.3.0.Final will fix this issue. Patch name: bbee3369f3825d0fba2373d821f6dc6d4fc82ec0. Upgrading the affected component is advised.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

通过错误消息导致的信息暴露

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-2026-116479

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-116479

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Patches & Fixes for CVE-2026-116479 (1)

🔗 fix: sanitize internal error messages in transport handlers by ez-lbz · Pull Request #1046 · a2aproject/a2a-java Read full article issue-tracking patch

Vendor Pages for CVE-2026-116479 (2)

https://www.cve.org/CVERecord?id=CVE-2026-116479

Same Patch Batch · a2aproject · 2026-10-26 · 4 CVEs total

CVE-2026-116476	5.4 MEDIUM	a2aproject a2a-dotnet TaskProjection TaskProjection.ApplyStatus race condition
CVE-2026-116478	5.3 MEDIUM	a2aproject a2a-go Push Notification agentexec.go CreateExecutor information exposure
CVE-2026-116477	4.3 MEDIUM	a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsyn

IV. Related Vulnerabilities

Same product: a2a-java

Same vendor: a2aproject

Same weakness: CWE-209