---
title: "CVE-2026-111764: A2A Java SDK - Broken Access Control"
description: "A2A Java SDK < 1.3.0.Final contains a broken access control vulnerability caused by lack of authorization checks in InMemoryTaskStore.get method, letting unauthenticated callers read tasks of others, exploit requires default configuration without authorization provider."
url: https://panop.io/threat-heartbeat/CVE-2026-111764/
---

# CVE-2026-111764 A2A Java SDK - Broken Access Control

A2A Java SDK < 1.3.0.Final contains a broken access control vulnerability caused by lack of authorization checks in InMemoryTaskStore.get method, letting unauthenticated callers read tasks of others, exploit requires default configuration without authorization provider.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111764)

## Details

Type

Broken Access Control

Impact

Information Disclosure

CVSS vector

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

Published

20 October 2026

Updated

21 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## Vendor fix

Update to version 1.3.0.Final or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-111764](https://nvd.nist.gov/vuln/detail/CVE-2026-111764)
- [https://github.com/a2aproject/a2a-java/commit/efb4e985e99390c4fc1f78c0a187a4254c0a2553](https://github.com/a2aproject/a2a-java/commit/efb4e985e99390c4fc1f78c0a187a4254c0a2553)
- [https://github.com/a2aproject/a2a-java/pull/1095](https://github.com/a2aproject/a2a-java/pull/1095)
- [https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final](https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final)
- [https://github.com/a2aproject/a2a-java/security/advisories/GHSA-qw47-mcm5-934w](https://github.com/a2aproject/a2a-java/security/advisories/GHSA-qw47-mcm5-934w)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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