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Tue, 20 Oct 2026 17:30:00 +0000
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Tue, 20 Oct 2026 15:30:00 +0000
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| Description | A2A Java SDK is the official Java SDK for the Agent2Agent (A2A) Protocol. Prior to 1.3.0.Final, the default InMemoryTaskStore configuration performs no authorization on task reads: the no-argument constructor sets authorizationProvider to null, and InMemoryTaskStore.get(String taskId) returns the stored task without checking the caller or owner. Authorization depends on supplying a TaskAuthorizationProvider and routing requests through AuthorizationRequestHandlerDecorator, whether installed through CDI or explicitly by the application. Default store wiring and manually constructed DefaultRequestHandler.builder().build() handlers, including integrations such as Spring, leave task reads unprotected when no effective authorization-provider and decorator check is installed. In a multi-caller deployment using the default configuration, a caller who knows or guesses another caller's task ID can retrieve the task status, context ID, message history, and artifacts. The default/reference transport endpoints do not enforce authentication, so the task-read disclosure is reachable by an unauthenticated caller rather than requiring a privileged account. This issue is fixed in version 1.3.0.Final. | |
| Title | A2A Java SDK has a fail-open default task authorization | |
| Weaknesses | CWE-1188 CWE-862 |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-10-20T16:15:50.172Z
Reserved: 2026-10-16T17:52:09.082Z
Link: CVE-2026-111764
Updated: 2026-10-20T16:15:36.166Z
Status : Received
Published: 2026-10-20T16:17:00.690
Modified: 2026-10-20T17:17:29.560
Link: CVE-2026-111764
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OpenCVE Enrichment
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