---
id: CVE-2026-111762
title: >-
  A2A Java SDK: Push notification credentials logged in cleartext on protobuf
  parse failure
summary: >-
  A2A Java SDK is the official Java SDK for the Agent2Agent (A2A) Protocol.
  Prior to 1.3.0.Final, RestHandler.parseRequestBody in
  `transport/rest/src/main/java/org/a2aproject/sdk/transport/rest/handler/RestHandler.java`
  logs the entire JSO…
severity: medium
cvss: 5.7
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-532
vendor: a2aproject
product: a2a-java
affected:
  - a2a-java < 1.3.0.Final
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T14:56:57.632Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111762'
references:
  - url: >-
      https://github.com/a2aproject/a2a-java/security/advisories/GHSA-x32g-jvvm-4725
    label: >-
      https://github.com/a2aproject/a2a-java/security/advisories/GHSA-x32g-jvvm-4725
  - url: >-
      https://github.com/a2aproject/a2a-java/commit/88827105fee0daaac0d883a4a68eb644571d7230
    label: >-
      https://github.com/a2aproject/a2a-java/commit/88827105fee0daaac0d883a4a68eb644571d7230
  - url: 'https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final'
    label: 'https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final'
tags:
  - cve.org
ingestedAt: '2026-10-20T15:09:24.112Z'
---

## Overview

A2A Java SDK is the official Java SDK for the Agent2Agent (A2A) Protocol. Prior to 1.3.0.Final, RestHandler.parseRequestBody in `transport/rest/src/main/java/org/a2aproject/sdk/transport/rest/handler/RestHandler.java` logs the entire JSON request body at SEVERE level when JsonFormat.parser().merge() throws InvalidProtocolBufferException. With push notifications enabled, createTaskPushNotificationConfiguration reaches this parser for requests to `/v1/tenants/{tenant}/tasks/{taskId}/pushNotificationConfigs`, whose token and authentication.credentials fields can contain bearer tokens and authentication credentials for client push endpoints. A valid JSON body that fails protobuf deserialization, including an unknown field under strict parsing or a schema mismatch, causes those secrets to be written to the server logs in cleartext. An attacker with access to the server logs or a log aggregation system can retrieve the credentials and potentially use the credentials to send forged task status updates to the client's push notification endpoint. This issue is fixed in version 1.3.0.Final.

## Affected

- `a2a-java < 1.3.0.Final`

## Remediation

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