{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "pyo3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.28.0"
            },
            {
              "fixed": "0.28.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-843"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-19T20:25:46Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "PyO3 0.28.1 added support for `#[pyclass(extends=PyList)] struct NativeSub` (and other native types) when targeting Python 3.12 and up with the `abi3` feature.\n\nIt was discovered that subclasses of such classes would use the type of the subclass when attempting to access to data of `NativeSub` contained within Python objects, amounting to memory corruption.\n\nPyO3 0.28.2 fixed the issue by using the type of (e.g.) `NativeSub` correctly.",
  "id": "GHSA-47qc-857f-7w7f",
  "modified": "2026-02-19T20:25:46Z",
  "published": "2026-02-19T20:25:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/PyO3/pyo3/pull/5807#issuecomment-3913251784"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PyO3/pyo3/commit/75abd8602896b350fd8c778e52e0a74b4644ccca"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/PyO3/pyo3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PyO3/pyo3/releases/tag/v0.28.2"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0013.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PyO3 has type confusion when accessing data from sublasses of subclasses of native types with `abi3` feature"
}