ghsa-r6xg-3mr4-3226
Vulnerability from github
Published
2025-12-29 15:30
Modified
2025-12-29 15:30
Details

A type confusion in jsish 2.0 allows incorrect control flow during execution of the OP_NEXT opcode. When an “instanceof” expression uses an array element access as the left-hand operand inside a for-in loop, the instructions implementation leaves an additional array reference on the stack rather than consuming it during OP_INSTANCEOF. As a result, OP_NEXT interprets the array as an iterator object and reads the iterCmd function pointer from an invalid structure, potentially causing a crash or enabling code execution depending on heap layout.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-65570"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-29T15:16:01Z",
    "severity": null
  },
  "details": "A type confusion in jsish 2.0 allows incorrect control flow during execution of the OP_NEXT opcode. When an \u201cinstanceof\u201d expression uses an array element access as the left-hand operand inside a for-in loop, the instructions implementation leaves an additional array reference on the stack rather than consuming it during OP_INSTANCEOF. As a result, OP_NEXT interprets the array as an iterator object and reads the iterCmd function pointer from an invalid structure, potentially causing a crash or enabling code execution depending on heap layout.",
  "id": "GHSA-r6xg-3mr4-3226",
  "modified": "2025-12-29T15:30:22Z",
  "published": "2025-12-29T15:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-65570"
    },
    {
      "type": "WEB",
      "url": "https://blog.mcsky.ro/writeups/2025/11/15/inline8-writeup.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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