Array index error in the scanstring function in the json module in Python 2.7 through 3.5 and simplejson before 2.6.1 allows context-dependent attackers to read arbitrary process memory via a negative index value in the idx argument to the rawdecode function.
{
    "nvd_published_at": "2017-08-24T20:29:00Z",
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-129"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-07-27T21:35:21Z"
}