CVE-2026-116477
a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-209 CWE-200 |
| Vendor | a2aproject |
| Product | a2a-dotnet |
| Published | Oct 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
a2aproject / a2a-dotnet
1.0.0-preview2
References
vuldb.com: https://vuldb.com/vuln/426390 vuldb.com: https://vuldb.com/vuln/426390/cti vuldb.com: https://vuldb.com/cve/CVE-2026-116477 vuldb.com: https://vuldb.com/submit/1014890 github.com: https://github.com/a2aproject/a2a-dotnet/pull/452 github.com: https://github.com/a2aproject/a2a-dotnet/commit/ccbd12b6108a6a8f0fd5d8b4a9ece3c8a94ba1e4 github.com: https://github.com/a2aproject/a2a-dotnet/releases/tag/v1.0.0-preview3 github.com: https://github.com/a2aproject/a2a-dotnet/
Credits
🔍 colorfullbz (VulDB User)