CVE-2026-119197

{
  "etk_id": "ETK-2026-3005",
  "cve_id": "CVE-2026-119197",
  "display_id": "CVE-2026-119197",
  "ghsa_id": "GHSA-mm57-4v3p-rchx",
  "euvd_id": "EUVD-2026-113353",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Quadratic decoding denial of service in pyasn1",
  "summary": "pyasn1 versions before 0.6.5 can consume excessive CPU when decoding attacker-controlled ASN.1 data containing a large binary REAL value. An attacker needs a path that passes untrusted ASN.1 input to BER, CER, or DER decoding and may cause availability loss by tying up decoding workers.",
  "mitigation": "Upgrade pyasn1 to version 0.6.5 or later. Until upgrades are complete, restrict untrusted ASN.1 input reaching pyasn1 decoders and apply input-size limits where possible.",
  "vendor": "pyasn1",
  "product": "pyasn1",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 0.6.4"
      ],
      "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": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 31.5685842,
  "t0_at": "2026-10-29T19:48:52.470000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-10-27T06:59:39+00:00",
      "days": -2.5341836805555555,
      "is_lower_bound": false,
      "measured_at": "2026-10-29T19:48:52.470000+00:00",
      "url": "https://github.com/pyasn1/pyasn1/security/advisories/GHSA-mm57-4v3p-rchx"
    },
    "trigger_signal": {
      "at": "2026-10-27T06:59:39+00:00",
      "days": -2.5341836805555555,
      "is_lower_bound": false,
      "measured_at": "2026-10-29T19:48:52.470000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-119197"
    }
  }
}