FKIE_CVE-2026-32284

Vulnerability from fkie_nvd - Published: 2026-03-26 20:16 - Updated: 2026-06-03 14:42
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
security@golang.orghttps://github.com/golang/vulndb/issues/4513Issue Tracking, Third Party Advisory
security@golang.orghttps://github.com/shamaton/msgpack/issues/59Issue Tracking, Vendor Advisory
security@golang.orghttps://pkg.go.dev/vuln/GO-2026-4513Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026Exploit, Third Party Advisory
Impacted products
Vendor Product Version
shamaton msgpack *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:shamaton:msgpack:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "E3EFFC2E-A452-4815-B2AC-3AD7CD6828D3",
              "versionEndIncluding": "3.1.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "El decodificador msgpack no valida correctamente la longitud del b\u00fafer de entrada al procesar datos fixext truncados (c\u00f3digos de formato 0xd4-0xd8). Esto puede provocar una lectura fuera de l\u00edmites y un p\u00e1nico en tiempo de ejecuci\u00f3n, lo que permite un ataque de denegaci\u00f3n de servicio."
    }
  ],
  "id": "CVE-2026-32284",
  "lastModified": "2026-06-03T14:42:23.987",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-26T20:16:12.087",
  "references": [
    {
      "source": "security@golang.org",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://github.com/golang/vulndb/issues/4513"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://github.com/shamaton/msgpack/issues/59"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://pkg.go.dev/vuln/GO-2026-4513"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026"
    }
  ],
  "sourceIdentifier": "security@golang.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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