CVE-2026-116476
Received Received - Intake

Race Condition in a2a-dotnet TaskProjection Component

Publication date: 2026-10-26

Last updated on: 2026-10-26

Assigner: VulDB

Description
A weakness has been identified in a2aproject a2a-dotnet up to 1.0.0-preview3. The affected element is the function TaskProjection.ApplyStatus of the component TaskProjection. Executing a manipulation can lead to race condition. The attack may be performed from remote. The pull request to fix this issue awaits acceptance.

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Meta Information

Published
2026-10-26
Last Modified
2026-10-26
Generated
2026-10-26
AI Q&A
2026-10-26
EPSS Evaluated
N/A
NVD
CVE-2026-116476
EUVD
EUVD-2026-110071

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
a2aproject a2a-dotnet 1.0.0-preview3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

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Executive Summary

This vulnerability is a race condition in the a2a-dotnet library up to version 1.0.0-preview3. It occurs in the TaskProjection.ApplyStatus function where concurrent operations can lead to inconsistent state changes. The issue allows remote attackers to manipulate task statuses, potentially causing unexpected behavior or data corruption.

Impact Analysis

The race condition could allow unauthorized modifications to task states, leading to incorrect task execution, data inconsistencies, or denial of service. Attackers might exploit this to bypass intended workflows or corrupt system state, especially in multi-user environments.

Mitigation Strategies

Apply the patch from the pull request at https://github.com/a2aproject/a2a-dotnet/pull/453 to enforce terminal state transitions and serialize cancellation operations under a per-task lock to prevent race conditions.

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