---
id: "CVE-2026-116476"
kind: "vulnerability"
aliases: ["CVE-2026-116476"]
title: "a2a-dotnet: race condition in TaskProjection.ApplyStatus, remotely triggerable"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["a2a", "dotnet", "nuget", "package"]
not_affected_if: []
published_at: "2026-10-26T19:16:30+00:00"
first_seen_at: "2026-10-26T19:32:06+00:00"
updated_at: "2026-10-26T19:33:57+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116476", "first_seen_at": "2026-10-26T19:32:06+00:00"}]
---

# a2a-dotnet: race condition in TaskProjection.ApplyStatus, remotely triggerable

The a2a-dotnet library (A2A protocol SDK for .NET) up to 1.0.0-preview3 has a race condition in the TaskProjection.ApplyStatus function that a remote manipulation can trigger. The sources do not say what data an attacker can read or change.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the version of the `A2A` or `a2a-dotnet` package in your .csproj or packages.lock.json; affected versions are up to `1.0.0-preview3`
- unknown

## Fix

- Move to a version of a2a-dotnet newer than `1.0.0-preview3` once a fix is released; the sources say the fix pull request is still awaiting acceptance
- unknown

## Timeline

- 2026-10-26T19:32:06+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116476

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_