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CVE-2026-8257

Estado: AnalizadaBaja (1.9)—

A vulnerability was detected in WebAssembly Binaryen up to 117. This issue affects the function IRBuilder::makeBrOn of the file src/wasm/wasm-ir-builder.cpp of the component BrOn Parser. Performing a manipulation results in reachable assertion. The attack needs to be approached locally. The exploit is now public and may be used. The patch is named 1251efbc1ea471c1311d2726b2bbe061ff2a291c. It is suggested to install a patch to address this issue.

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)

Webassembly — Binaryen

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-8257",
  "cveTags": [],
  "metrics": {
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          "exploitMaturity": "PROOF_OF_CONCEPT",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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  "references": [
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      "source": "cna@vuldb.com"
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      "tags": [
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        "Issue Tracking",
        "Third Party Advisory"
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      "source": "cna@vuldb.com"
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      "url": "https://github.com/WebAssembly/binaryen/pull/8635",
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  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-617"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was detected in WebAssembly Binaryen up to 117. This issue affects the function IRBuilder::makeBrOn of the file src/wasm/wasm-ir-builder.cpp of the component BrOn Parser. Performing a manipulation results in reachable assertion. The attack needs to be approached locally. The exploit is now public and may be used. The patch is named 1251efbc1ea471c1311d2726b2bbe061ff2a291c. It is suggested to install a patch to address this issue."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad fue detectada en WebAssembly Binaryen hasta la versión 117. Este problema afecta la función IRBuilder::makeBrOn del archivo src/wasm/wasm-ir-builder.cpp del componente BrOn Parser. Realizar una manipulación resulta en una aserción alcanzable. El ataque necesita ser abordado localmente. El exploit ahora es público y puede ser utilizado. El parche se llama 1251efbc1ea471c1311d2726b2bbe061ff2a291c. Se sugiere instalar un parche para abordar este problema."
    }
  ],
  "lastModified": "2026-07-23T20:10:00.130",
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              "versionEndIncluding": "117"
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}