{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116477","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","state":"PUBLISHED","assignerShortName":"VulDB","dateReserved":"2026-10-26T10:59:40.497Z","datePublished":"2026-10-26T19:15:22.114Z","dateUpdated":"2026-10-31T01:43:26.819Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","shortName":"VulDB","dateUpdated":"2026-10-26T19:15:22.114Z"},"title":"a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure","problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-209","lang":"en","description":"Information Exposure Through Error Message"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-200","lang":"en","description":"Information Disclosure"}]}],"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"]}],"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."}],"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"}}],"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"}],"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"]}],"tags":["x_open-source"],"x_generator":["VulDB PVTS v202610"]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-31T01:43:16.112423Z","id":"CVE-2026-116477","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-31T01:43:26.819Z"}}]}}