Vulnerability · Published Oct 26, 2026 · Assigned by VulDB
CVE-2026-116476a2aproject a2a-dotnet TaskProjection TaskProjection.ApplyStatus race condition
Medium 5.4
In plain English
A medium-severity race condition in a2a-dotnet from a2aproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 89.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| a2aproject | a2a-dotnet | 1.0.0-preview3 |
Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:X/RC:C
References
- VDB-426389 | a2aproject a2a-dotnet TaskProjection TaskProjection.ApplyStatus race condition vdb-entry, technical-description
- VDB-426389 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-116476 | CVE Analysis and Report third-party-advisory
- Submit #1014886 | a2aproject a2a-dotnet v1.0 CWE-362 third-party-advisory
- https://github.com/a2aproject/a2a-dotnet/pull/453 issue-tracking, patch
- https://github.com/a2aproject/a2a-dotnet/ product