{
  "cveId": "CVE-2026-119197",
  "url": "https://patchblox.com/security/cve/CVE-2026-119197",
  "summary": "CVE-2026-119197 is fixed in pyasn1 on 1 platform by DEBIAN-CVE-2026-119197 (version 0.6.5-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "pyasn1: Quadratic-complexity denial of service in binary REAL decoding",
  "description": "pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, binary REAL decoding builds a large mantissa one octet at a time by shifting a growing integer and slicing the remaining byte string. Attacker-controlled ASN.1 includes a binary-encoded REAL with a large mantissa and reaches BER, CER, or DER decode(), with or without a schema containing REAL. RealPayloadDecoder.valueDecoder repeatedly performs a left shift, OR, and suffix copy for every mantissa octet, making decode time quadratic in mantissa length. A comparatively small REAL value can hold a decoding worker on one CPU core for seconds or longer and cause availability loss. This issue is fixed in version 0.6.5.",
  "published": "2026-10-29T20:17:30Z",
  "severity": "Important",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Inefficient Algorithmic Complexity",
  "epss": 0.00425,
  "epssPercentile": 0.37057,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119197",
  "fixes": [
    {
      "platform": "linux",
      "product": "pyasn1",
      "release": "Debian 14",
      "fixedVersion": "0.6.5-1",
      "fix": "DEBIAN-CVE-2026-119197",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-119197",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}