{"id":"CVE-2026-116477","title":"a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure","summary":"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…","severity":"medium","cvss":4.3,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-209","CWE-200"],"vendor":"a2aproject","product":"a2a-dotnet","affected":["a2a-dotnet 1.0.0-preview2"],"published":"2026-10-26","updated":"2026-10-26","sourceUpdated":"2026-10-26T19:15:22.114Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116477","references":[{"url":"https://vuldb.com/vuln/426390","label":"VDB-426390 | a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure"},{"url":"https://vuldb.com/vuln/426390/cti","label":"VDB-426390 | CTI Indicators (IOB, IOC, TTP, IOA)"},{"url":"https://vuldb.com/cve/CVE-2026-116477","label":"CVE-2026-116477 | CVE Analysis and Report"},{"url":"https://vuldb.com/submit/1014890","label":"Submit #1014890 | a2aproject a2a-dotnet ≤ v1.0.0-preview2 CWE-209"},{"url":"https://github.com/a2aproject/a2a-dotnet/pull/452"},{"url":"https://github.com/a2aproject/a2a-dotnet/commit/ccbd12b6108a6a8f0fd5d8b4a9ece3c8a94ba1e4"},{"url":"https://github.com/a2aproject/a2a-dotnet/releases/tag/v1.0.0-preview3"},{"url":"https://github.com/a2aproject/a2a-dotnet/"}],"tags":["cve.org"],"ingestedAt":"2026-10-26T19:38:01.146Z","epss":0.00315,"epssPercentile":0.24282,"slug":"CVE-2026-116477","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `a2a-dotnet 1.0.0-preview2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}