{"id":"CVE-2026-116477","state":"PUBLISHED","title":"a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure","description":"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.","publishedAt":"2026-10-26T19:15:22.114Z","updatedAt":"2026-10-26T19:15:22.114Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X","source":"VulDB"},"assigner":"VulDB","products":["a2aproject a2a-dotnet"],"affected":[{"vendor":"a2aproject","product":"a2a-dotnet","versions":[{"version":"1.0.0-preview2","status":"affected"},{"version":"1.0.0-preview3","status":"unaffected"}],"cpes":["cpe:2.3:a:a2aproject:a2a-dotnet:*:*:*:*:*:*:*:*"],"modules":["Parser"]}],"references":["https://vuldb.com/vuln/426390","https://vuldb.com/vuln/426390/cti","https://vuldb.com/cve/CVE-2026-116477","https://vuldb.com/submit/1014890","https://github.com/a2aproject/a2a-dotnet/pull/452","https://github.com/a2aproject/a2a-dotnet/commit/ccbd12b6108a6a8f0fd5d8b4a9ece3c8a94ba1e4","https://github.com/a2aproject/a2a-dotnet/releases/tag/v1.0.0-preview3","https://github.com/a2aproject/a2a-dotnet/"],"weaknesses":["CWE-209","CWE-200"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116477.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116477","state":"PUBLISHED","datePublished":"2026-10-26T19:15:22.114Z","dateUpdated":"2026-10-26T19:15:22.114Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-10-26T10:59:40.497Z"},"containers":{"cna":{"title":"a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"a2aproject","product":"a2a-dotnet","versions":[{"version":"1.0.0-preview2","status":"affected"},{"version":"1.0.0-preview3","status":"unaffected"}],"cpes":["cpe:2.3:a:a2aproject:a2a-dotnet:*:*:*:*:*:*:*:*"],"modules":["Parser"]}],"references":[{"url":"https://vuldb.com/vuln/426390","name":"VDB-426390 | a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/426390/cti","name":"VDB-426390 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-116477","name":"CVE-2026-116477 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/1014890","name":"Submit #1014890 | a2aproject a2a-dotnet ≤ v1.0.0-preview2 CWE-209","tags":["third-party-advisory"]},{"url":"https://github.com/a2aproject/a2a-dotnet/pull/452","tags":["issue-tracking","patch"]},{"url":"https://github.com/a2aproject/a2a-dotnet/commit/ccbd12b6108a6a8f0fd5d8b4a9ece3c8a94ba1e4","tags":["patch"]},{"url":"https://github.com/a2aproject/a2a-dotnet/releases/tag/v1.0.0-preview3","tags":["patch"]},{"url":"https://github.com/a2aproject/a2a-dotnet/","tags":["product"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":5.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":4.3,"vectorString":"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","baseSeverity":"MEDIUM"}},{"cvssV3_0":{"version":"3.0","baseScore":4.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C","baseSeverity":"MEDIUM"}},{"cvssV2_0":{"version":"2.0","baseScore":4,"vectorString":"AV:N/AC:L/Au:S/C:P/I:N/A:N/E:ND/RL:OF/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-209","type":"CWE","lang":"en","description":"Information Exposure Through Error Message"}]},{"descriptions":[{"cweId":"CWE-200","type":"CWE","lang":"en","description":"Information Disclosure"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-10-26T19:15:22.114Z"},"timeline":[{"time":"2026-10-26T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-10-26T01:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-10-26T12:04:58.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"colorfullbz (VulDB User)","type":"reporter"}],"tags":["x_open-source"],"x_generator":["VulDB PVTS v202610"]}}}}