{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "46.0.0"
                  },
                  {
                    "fixed": "48.0.7"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "49.0.0"
                  },
                  {
                    "fixed": "49.0.4"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "222ff3a65dab9aa7011f8c246937751a0bac5abd"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "48dacc76241f06088e79f3ce1b17642f2f7bf158"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "994549891c8a706cb4f2809f9d17b9f67b31e618"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v48.0.7",
                "range": [
                  {
                    "fixed": "c6846e13f64b07b7912d372db141397058b55f99"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "v49.0.4",
                "range": [
                  {
                    "fixed": "2c2970205fe05d6bbf15b9bff6f1e67874b2db5c"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "423be7a4e4d30bb377c836d317521d1eb874e157"
            },
            {
              "fixed": "c6846e13f64b07b7912d372db141397058b55f99"
            },
            {
              "introduced": "17830bd3c0331d920a8aa38846eebc4d46d98c23"
            },
            {
              "fixed": "2c2970205fe05d6bbf15b9bff6f1e67874b2db5c"
            },
            {
              "fixed": "222ff3a65dab9aa7011f8c246937751a0bac5abd"
            },
            {
              "fixed": "48dacc76241f06088e79f3ce1b17642f2f7bf158"
            },
            {
              "fixed": "994549891c8a706cb4f2809f9d17b9f67b31e618"
            }
          ],
          "repo": "https://github.com/bytecodealliance/wasmtime",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9pvw-hwfg-92h5"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-248",
      "CWE-843"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115892.json"
  },
  "details": "Wasmtime is a runtime for WebAssembly. From 46.0.0 until 48.0.7 and 49.0.4, lowering a host-created component-model stream or future into a guest can omit a required payload-type check after the value passes through guest code and returns through StreamAny, FutureAny, Val::Stream, Val::Future, or an equivalent typed reader. A malicious guest that controls exported function types or returned values can cause the host to pass the type-erased value to a guest expecting a different payload type, which panics the Wasmtime host. This issue is fixed in versions 48.0.7 and 49.0.4.",
  "id": "CVE-2026-115892",
  "modified": "2026-10-25T02:30:50.741019950Z",
  "published": "2026-10-23T21:26:54.528Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115892.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-9pvw-hwfg-92h5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115892"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bytecodealliance/wasmtime/commit/48dacc76241f06088e79f3ce1b17642f2f7bf158"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14819"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14820"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14827"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Wasmtime: Panic lowering a host-created component model stream into a guest that expects a different payload type"
}