ETK-2026-3822Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-3822",
  "cve_id": null,
  "display_id": "ETK-2026-3822",
  "ghsa_id": "GHSA-gg4m-grc6-63f2",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Use-after-free in cbor2 C decoder",
  "summary": "cbor2 5.9.0 is affected by a use-after-free in its C-based CBOR decoder. An attacker able to supply a truncated, large definite-length text string for decoding can corrupt memory and crash the Python process.",
  "mitigation": "Upgrade cbor2 to version 6.0.0 or later. Until upgrading, do not decode untrusted CBOR input with cbor2 5.9.0.",
  "vendor": "pip",
  "product": "pip:cbor2",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<=5.9.0"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "6.0.0"
      ],
      "package_name": "cbor2",
      "purl": "pkg:pypi/cbor2"
    }
  ],
  "cwes": [
    415
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 8.6077224,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-11-07T10:16:55+00:00",
      "days": -0.5933400202083333,
      "is_lower_bound": true,
      "measured_at": "2026-11-08T00:31:19.621324+00:00",
      "url": "https://github.com/agronholm/cbor2/security/advisories/GHSA-gg4m-grc6-63f2"
    },
    "trigger_signal": {
      "at": "2026-11-07T10:16:55+00:00",
      "days": -0.5933400202083333,
      "is_lower_bound": true,
      "measured_at": "2026-11-08T00:31:19.621324+00:00",
      "url": "https://github.com/agronholm/cbor2/security/advisories/GHSA-gg4m-grc6-63f2"
    }
  }
}