GHSA-JGVR-6X5W-HX5W

Vulnerability from github – Published: 2026-08-20 18:34 – Updated: 2026-08-20 18:34
VLAI
Summary
Zoo Design Studio: Recursive KCL parsing is vulnerable to denial-of-service
Details

Impact

Feeding a KCL program that wraps an expression in deep, unnecessary parentheses triggers the parser’s recursive expression -> unnecessarily_bracketed -> expression path. With enough nesting, the call stack grows until it exceeds the process stack limit, causing a stack overflow.

Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "zoo-kcl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.129"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 0.2.129"
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "kcl-lib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.129"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-20T18:34:05Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nFeeding a KCL program that wraps an expression in deep, unnecessary parentheses triggers the parser\u2019s recursive `expression` -\u003e `unnecessarily_bracketed` -\u003e `expression` path. With enough nesting, the call stack grows until it exceeds the process stack limit, causing a stack overflow.",
  "id": "GHSA-jgvr-6x5w-hx5w",
  "modified": "2026-08-20T18:34:05Z",
  "published": "2026-08-20T18:34:05Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/KittyCAD/modeling-app/security/advisories/GHSA-jgvr-6x5w-hx5w"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/KittyCAD/modeling-app"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Zoo Design Studio: Recursive KCL parsing is vulnerable to denial-of-service"
}



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