Security advisory

{
  "id": "00bdac7dc04421deef872afef3ad71f94dfe5f828cb1aeb91f32f8f5b7416130",
  "url": "https://osv.dev/vulnerability/CVE-2019-12760",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-12760",
    "summary": "A deserialization vulnerability exists in the way parso through 0.4.0 handles grammar parsing from the cache. Cache loading relies on pickle and, provided that an evil pickle can be written to a cache grammar file and that its parsing can be triggered, this flaw leads to Arbitrary Code Execution. NOTE: This is disputed because \"the cache directory is not under control of the attacker in any common configuration.",
    "evidence": "osv:CVE-2019-12760",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-12760",
      "aliases": [
        "CVE-2019-12760",
        "GHSA-22mf-97vh-x8rw",
        "PYSEC-2019-109"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/davidhalter/parso",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "8a06f0da0592b33ff002bf699d05e7c31a613b17"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:parso_project:parso:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.4.0",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.1",
            "v0.2.0",
            "v0.1.1",
            "v0.1.0",
            "v0.0.4",
            "v0.0.3",
            "v0.0.2",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-12760.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:40.196058395Z",
      "provider": "osv",
      "references": [
        "https://github.com/davidhalter/parso/issues/75",
        "https://gist.github.com/dhondta/f71ae7e5c4234f8edfd2f12503a5dcc7"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-12760",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383727,
  "published_at": "2019-06-06T19:29:00.5+00:00"
}