data/osv/GO-2026-4513.json

{
  "schema_version": "1.3.1",
  "id": "GO-2026-4513",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2026-32284"
  ],
  "summary": "Denial of service in github.com/shamaton/msgpack",
  "details": "The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.",
  "affected": [
    {
      "package": {
        "name": "github.com/shamaton/msgpack",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/shamaton/msgpack",
            "symbols": [
              "DecodeStructAsArray",
              "DecodeStructAsMap",
              "Unmarshal",
              "UnmarshalAsArray",
              "UnmarshalAsMap"
            ]
          }
        ]
      }
    },
    {
      "package": {
        "name": "github.com/shamaton/msgpack/v2",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/shamaton/msgpack/v2",
            "symbols": [
              "Unmarshal",
              "UnmarshalAsArray",
              "UnmarshalAsMap"
            ]
          }
        ]
      }
    },
    {
      "package": {
        "name": "github.com/shamaton/msgpack/v3",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/shamaton/msgpack/v3",
            "symbols": [
              "Unmarshal",
              "UnmarshalAsArray",
              "UnmarshalAsMap"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "REPORT",
      "url": "https://github.com/shamaton/msgpack/issues/59"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/golang/vulndb/issues/4513"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2026-4513",
    "review_status": "REVIEWED"
  }
}