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CVE-2025-27105

Estado: AnalizadaBaja (2.3)—

vyper is a Pythonic Smart Contract Language for the EVM. Vyper handles AugAssign statements by first caching the target location to avoid double evaluation. However, in the case when target is an access to a DynArray and the rhs modifies the array, the cached target will evaluate first, and the bounds check will not be re-evaluated during the write portion of the statement. This issue has been addressed in version 0.4.1 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

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)

Vyperlang — Vyper

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-27105",
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          "id": "CVE-2025-27105",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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              "automatable": "yes"
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            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-02-22T15:36:50.306173Z"
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "exploitabilityScore": 3.9
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    "cvssMetricV40": [
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        "type": "Secondary",
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          "valueDensity": "NOT_DEFINED",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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  "published": "2025-02-21T22:15:13.910",
  "references": [
    {
      "url": "https://github.com/vyperlang/vyper/security/advisories/GHSA-4w26-8p97-f4jp",
      "tags": [
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        "Vendor Advisory"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
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      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "vyper is a Pythonic Smart Contract Language for the EVM. Vyper handles AugAssign statements by first caching the target location to avoid double evaluation. However, in the case when target is an access to a DynArray and the rhs modifies the array, the cached target will evaluate first, and the bounds check will not be re-evaluated during the write portion of the statement. This issue has been addressed in version 0.4.1 and all users are advised to upgrade. There are no known workarounds for this vulnerability."
    },
    {
      "lang": "es",
      "value": "vyper es un lenguaje de contrato inteligente Pythonic para EVM. Vyper gestiona las instrucciones AugAssign almacenando primero en caché la ubicación de destino para evitar una doble evaluación. Sin embargo, en el caso en que el destino sea un acceso a un DynArray y el rhs modifique la matriz, el destino almacenado en caché se evaluará primero y la verificación de límites no se volverá a evaluar durante la parte de escritura de la instrucción. Este problema se ha solucionado en la versión 0.4.1 y se recomienda a todos los usuarios que actualicen. No existen workarounds conocidos para esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T09:03:02.543",
  "configurations": [
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