{
  "id": "CVE-2026-115893",
  "url": "https://spydr.io/cve/CVE-2026-115893",
  "published": "2026-10-23T22:16:58.820Z",
  "modified": "2026-10-23T22:16:58.947Z",
  "score": 9.9,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "score_source": "github.com",
  "epss": null,
  "epss_percentile": null,
  "exploited": false,
  "kev": null,
  "ssvc_exploitation": null,
  "vendors": [
    "bytecodealliance"
  ],
  "products": [
    "bytecodealliance wasmtime"
  ],
  "cwes": [
    "CWE-691"
  ],
  "description": "Wasmtime is a runtime for WebAssembly. Prior to 36.0.19, 48.0.7, and 49.0.4, the Cranelift compiler backend on aarch64 can compile a Wasm br_table instruction with more than approximately 256,000 targets so that it has an incorrect conditional branch target. The branch can then jump to arbitrary other code at a user-controlled offset, allowing a user-controlled Wasm module to escape the sandbox on aarch64 engines using the default Cranelift backend. This issue is fixed in versions 36.0.19, 48.0.7, and 49.0.4.",
  "status": "Deferred",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.9,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/e61df1b454be9313d61a5f8de07722a421139bbe",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14818",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14819",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14820",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14826",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.19",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4",
      "tags": []
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mghf-wjfp-p5xm",
      "tags": []
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115893",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}