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        "high": 0,
        "critical": 0,
        "unknown": 0
      },
      "attribution": {
        "explicit_ai_marker": 0,
        "ai_affiliation_only": 3,
        "fuzzing_marker": 0,
        "other_or_unmarked": 7
      }
    },
    {
      "period": "2026-Q2",
      "year": 2026,
      "quarter": 2,
      "period_start": "2026-04-01",
      "period_end": "2026-06-30",
      "complete_period": true,
      "total": 26,
      "severity": {
        "low": 17,
        "medium": 9,
        "high": 0,
        "critical": 0,
        "unknown": 0
      },
      "attribution": {
        "explicit_ai_marker": 2,
        "ai_affiliation_only": 10,
        "fuzzing_marker": 0,
        "other_or_unmarked": 14
      }
    },
    {
      "period": "2026-Q3",
      "year": 2026,
      "quarter": 3,
      "period_start": "2026-07-01",
      "period_end": "2026-09-02",
      "complete_period": false,
      "total": 9,
      "severity": {
        "low": 8,
        "medium": 1,
        "high": 0,
        "critical": 0,
        "unknown": 0
      },
      "attribution": {
        "explicit_ai_marker": 0,
        "ai_affiliation_only": 7,
        "fuzzing_marker": 0,
        "other_or_unmarked": 2
      }
    }
  ],
  "classification": {
    "unit": "one public curl vulnerability disclosure",
    "date": "published date in curl's vulnerability JSON",
    "severity": "curl maintainer severity label",
    "attribution": {
      "explicit_ai_marker": "Finder credit names an AI system, AI method, powered-by wording, or explicit collaboration marker.",
      "ai_affiliation_only": "Finder credit names a selected AI-security affiliation but does not state a method.",
      "fuzzing_marker": "Finder credit contains a fuzzing marker and no AI marker.",
      "other_or_unmarked": "No selected AI or fuzzing marker appears in the finder credit."
    }
  },
  "caveats": [
    "The series measures disclosures, not the number of vulnerabilities introduced or remaining.",
    "Credit text is not proof of the method used and can misclassify records in both directions.",
    "The series has no denominator for search effort, submissions, code size, or triage capacity.",
    "curl publishes vulnerabilities in release batches, and the latest period may be incomplete.",
    "One software project is a reporting control and pipeline sentinel, not a representative measure of scientific progress."
  ]
}