{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:a2aproject:a2a-dotnet:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Parser"
          ],
          "product": "a2a-dotnet",
          "vendor": "a2aproject",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0-preview2"
            },
            {
              "status": "unaffected",
              "version": "1.0.0-preview3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "colorfullbz (VulDB User)"
        }
      ],
      "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": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "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",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "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",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "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",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 4,
            "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N/E:ND/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-209",
              "description": "Information Exposure Through Error Message",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "Information Disclosure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T19:15:22.114Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-426390 | a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/426390"
        },
        {
          "name": "VDB-426390 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/426390/cti"
        },
        {
          "name": "CVE-2026-116477 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-116477"
        },
        {
          "name": "Submit #1014890 | a2aproject a2a-dotnet \u2264 v1.0.0-preview2 CWE-209",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/1014890"
        },
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/a2aproject/a2a-dotnet/pull/452"
        },
        {
          "tags": [
            "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": [
            "product"
          ],
          "url": "https://github.com/a2aproject/a2a-dotnet/"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-26T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-10-26T01:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-10-26T12:04:58.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure",
      "x_generator": [
        "VulDB PVTS v202610"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-116477",
    "datePublished": "2026-10-26T19:15:22.114Z",
    "dateReserved": "2026-10-26T10:59:40.497Z",
    "dateUpdated": "2026-10-26T19:15:22.114Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}