Security advisory

{
  "id": "4593f3764f73b41b66ef2a4ccf7a217545bbedadb2e873e44043bec46d002984",
  "url": "https://osv.dev/vulnerability/CVE-2021-33796",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-33796",
    "summary": "In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.",
    "evidence": "osv:CVE-2021-33796",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-33796",
      "aliases": [
        "CVE-2021-33796"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ccxvii/mujs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7ef066a3bb95bf83e7c5be50d859e62e58fe8515"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:artifex:mujs:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7ef066a3bb95bf83e7c5be50d859e62e58fe8515"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.1.1",
            "1.1.0",
            "1.0.9",
            "1.0.8",
            "1.0.7",
            "1.0.6",
            "1.0.5",
            "1.0.4",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33796.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-33796-e543a7de",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "338333220833133376933355851326696902916",
                    "283965734103404473797971400087628404331",
                    "1358722741890325895702506387155976794",
                    "88382981335572426181156433582542351521"
                  ]
                },
                "source": "https://github.com/ccxvii/mujs/commit/7ef066a3bb95bf83e7c5be50d859e62e58fe8515",
                "target": {
                  "file": "jsrun.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:09:43Z"
          }
        }
      ],
      "modified": "2026-10-20T14:09:43.826807904Z",
      "provider": "osv",
      "references": [
        "https://github.com/ccxvii/mujs/commit/7ef066a3bb95bf83e7c5be50d859e62e58fe8515"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-33796",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388597,
  "published_at": "2023-07-07T18:15:09.43+00:00"
}