{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "incident": {
    "id": "cve-2026-115889",
    "url": "https://cveboard.org/i/cve-2026-115889",
    "urlPt": "https://cveboard.org/pt/i/cve-2026-115889",
    "json": "https://cveboard.org/i/cve-2026-115889.json",
    "kind": "vuln",
    "live": true,
    "knownExploited": false,
    "severity": "critical",
    "title": "Wasmtime: Bit-packing in Cranelift compiler causes silent overflow and miscompilation",
    "summary": "In Wasmtime prior to v43, the Cranelift compiler backend bit-packs its SSA value indices in a way that can result in silent overflow in release builds, and result in incorrect value references in the IR resulting in arbitrary miscompilation.",
    "titlePt": "Wasmtime: empacotamento de bits no compilador Cranelift causa transbordamento silencioso e compilação incorreta",
    "summaryPt": "No Wasmtime anterior à v43, o backend do compilador Cranelift empacota seus índices de valores SSA de uma maneira que pode resultar em transbordamento silencioso em builds de lançamento, e resultar em referências de valores incorretas no IR, resultando em compilação incorreta arbitrária.",
    "affected": [
      {
        "vendor": "bytecodealliance",
        "product": "wasmtime",
        "defaultStatus": "unknown",
        "versions": [
          {
            "version": "< 36.0.19",
            "status": "affected",
            "lessThan": null,
            "lessThanOrEqual": null
          },
          {
            "version": ">= 37.0.0, < 43.0.0",
            "status": "affected",
            "lessThan": null,
            "lessThanOrEqual": null
          }
        ],
        "omitted": 0,
        "fixed": []
      }
    ],
    "omitted": 0,
    "references": [],
    "cwes": [
      {
        "id": "CWE-197",
        "name": "Numeric Truncation Error"
      },
      {
        "id": "CWE-843",
        "name": "Access of Resource Using Incompatible Type ('Type Confusion')"
      }
    ],
    "ssvc": null,
    "fix": "listed",
    "tags": [
      "bytecodealliance",
      "rust"
    ],
    "cves": [
      "CVE-2026-115889"
    ],
    "ghsa": "GHSA-897f-g5gm-fmxm",
    "cvss": {
      "score": 9.9,
      "version": "3.1",
      "by": "GitHub"
    },
    "epss": null,
    "packages": [
      {
        "ecosystem": "rust",
        "name": "wasmtime",
        "vulnerable": "< 36.0.19",
        "fixed": "36.0.19",
        "advisory": "GHSA-897f-g5gm-fmxm"
      },
      {
        "ecosystem": "rust",
        "name": "wasmtime",
        "vulnerable": ">= 37.0.0, < 43.0.0",
        "fixed": "43.0.0",
        "advisory": "GHSA-897f-g5gm-fmxm"
      }
    ],
    "vendor": "bytecodealliance",
    "product": "wasmtime",
    "kev": null,
    "breach": null,
    "retracted": false,
    "sources": [
      {
        "label": "GitHub Advisory Database",
        "url": "https://github.com/advisories/GHSA-897f-g5gm-fmxm"
      }
    ],
    "cveVersion": 1,
    "cvePending": false,
    "publishedAt": "2026-10-23T22:02:20.000Z",
    "updatedAt": "2026-10-23T22:02:20.000Z"
  },
  "live": true,
  "events": [
    {
      "id": "ghsa:GHSA-897f-g5gm-fmxm:ghsa_published:2026-10-23T22:02:20.000Z",
      "incidentId": "cve-2026-115889",
      "type": "ghsa_published",
      "at": "2026-10-23T22:02:20.000Z",
      "detail": {
        "ghsa": "GHSA-897f-g5gm-fmxm",
        "severity": "critical",
        "fixed": "36.0.19, 43.0.0"
      }
    }
  ]
}