A security vulnerability has been detected in a2aproject a2a-dotnet up to 1.0.0-preview2. The impacted element is the function A2AJsonRpcProcessor.ProcessRequestAsync of the file src/A2A.AspNetCore/A2AJsonRpcProcessor.cs of the component Parser. The manipulation leads to information exposure through error message.
It is possible to initiate the attack remotely. Upgrading to version 1.0.0-preview3 is sufficient to resolve this issue. The identifier of the patch is ccbd12b6108a6a8f0fd5d8b4a9ece3c8a94ba1e4.
Upgrading the affected component is recommended.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
a2aproject:a2a-dotnet
References 8
https://github.com/a2aproject/a2a-dotnet/
cna@vuldb.com
https://github.com/a2aproject/a2a-dotnet/commit/ccbd12b6108a6a8f0fd5d8b4a9ece3c…
cna@vuldb.com
https://github.com/a2aproject/a2a-dotnet/pull/452
cna@vuldb.com
https://github.com/a2aproject/a2a-dotnet/releases/tag/v1.0.0-preview3
cna@vuldb.com
https://vuldb.com/cve/CVE-2026-116477
cna@vuldb.com
https://vuldb.com/submit/1014890
cna@vuldb.com
https://vuldb.com/vuln/426390
cna@vuldb.com
https://vuldb.com/vuln/426390/cti
cna@vuldb.com