{
  "cveId": "CVE-2026-119196",
  "url": "https://patchblox.com/security/cve/CVE-2026-119196",
  "summary": "CVE-2026-119196 is fixed in pyasn1 on 1 platform by DEBIAN-CVE-2026-119196 (version 0.6.5-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "pyasn1: Quadratic CPU consumption in constructed BIT STRING decoding",
  "description": "pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, constructed BIT STRING decoding repeatedly shifts and copies the complete bit value accumulated from earlier fragments. Attacker-controlled BER or CER input contains many constructed BIT STRING fragments; schema-driven DER also accepts a definite-length constructed BIT STRING. BitStringPayloadDecoder repeatedly calls BitString.fromOctetString with the prior bitString as prepend, shifting an ever-growing SizedInteger for each fragment and causing quadratic work. Large fragmented values can exhaust CPU during decode() without requiring later conversion or formatting. 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": 0.37058,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119196",
  "fixes": [
    {
      "platform": "linux",
      "product": "pyasn1",
      "release": "Debian 14",
      "fixedVersion": "0.6.5-1",
      "fix": "DEBIAN-CVE-2026-119196",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-119196",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}