ETK-2026-2769Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2769",
  "cve_id": null,
  "display_id": "ETK-2026-2769",
  "ghsa_id": "GHSA-fm9c-5rcf-2q5p",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Quadratic CPU denial of service in pyasn1 schemaless decoding",
  "summary": "pyasn1 before 0.6.5 can consume disproportionate CPU when schemaless BER, CER, or DER decoding processes attacker-controlled ASN.1 data. An attacker able to supply crafted valid encoded input to this decoding path may reduce service availability through CPU exhaustion.",
  "mitigation": "Upgrade pyasn1 to version 0.6.5. Until upgraded, avoid schemaless decoding of untrusted BER, CER, or DER data and apply input limits where possible.",
  "vendor": "pip",
  "product": "pip:pyasn1",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.3.3, < 0.6.5"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.6.5"
      ],
      "package_name": "pyasn1",
      "purl": "pkg:pypi/pyasn1"
    }
  ],
  "cwes": [
    407
  ],
  "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": 32.5844454,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-10-27T06:58:27+00:00",
      "days": -0.507151118113426,
      "is_lower_bound": true,
      "measured_at": "2026-10-27T19:08:44.900256+00:00",
      "url": "https://github.com/pyasn1/pyasn1/security/advisories/GHSA-fm9c-5rcf-2q5p"
    },
    "trigger_signal": {
      "at": "2026-10-27T06:58:27+00:00",
      "days": -0.507151118113426,
      "is_lower_bound": true,
      "measured_at": "2026-10-27T19:08:44.900256+00:00",
      "url": "https://github.com/pyasn1/pyasn1/security/advisories/GHSA-fm9c-5rcf-2q5p"
    }
  }
}