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CVE-2021-46878

Estado: ModificadaAlta (7.8)—

An issue was discovered in Treasure Data Fluent Bit 1.7.1, erroneous parsing in flb_pack_msgpack_to_json_format leads to type confusion bug that interprets whatever is on the stack as msgpack maps and arrays, leading to use-after-free. This can be used by an attacker to craft a specially craft file and trick the victim opening it using the affect software, triggering use-after-free and execute arbitrary code on the target system.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Treasuredata — Fluent BIT

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-46878",
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  "metrics": {
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          "id": "CVE-2021-46878",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
            },
            {
              "automatable": "no"
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            {
              "technicalImpact": "total"
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          ],
          "version": "2.0.3",
          "timestamp": "2025-02-11T20:59:39.165109Z"
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    }
  ],
  "lastModified": "2026-06-17T04:15:43.120",
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