{
  "cveId": "CVE-2026-119195",
  "url": "https://patchblox.com/security/cve/CVE-2026-119195",
  "summary": "CVE-2026-119195 is fixed in pyasn1 on 1 platform by DEBIAN-CVE-2026-119195 (version 0.6.5-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "pyasn1: Quadratic-time denial of service in constructed string and indefinite-length ANY decoding",
  "description": "pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, constructed string and indefinite-length ANY decoding repeatedly concatenates each fragment onto a growing bytes value. Attacker-controlled BER or CER data can use many constructed OCTET STRING or character-string fragments. DER rejects constructed OCTET STRING without a schema, but accepts its definite-length form when asn1Spec selects univ.OctetString; it also accepts constructed character strings such as UTF8String without a schema, even though those encodings are not valid DER. The separate indefinite-length ANY path is reachable in BER and CER when asn1Spec selects univ.Any; DER rejects indefinite lengths. OctetStringPayloadDecoder uses growing header concatenation and AnyPayloadDecoder.indefLenValueDecoder uses growing chunk concatenation, repeatedly copying an increasing prefix and causing quadratic work. A sufficiently fragmented value can occupy decoding workers and cause CPU exhaustion without confidentiality or integrity impact. 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": 0.00527,
  "epssPercentile": 0.44884,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119195",
  "fixes": [
    {
      "platform": "linux",
      "product": "pyasn1",
      "release": "Debian 14",
      "fixedVersion": "0.6.5-1",
      "fix": "DEBIAN-CVE-2026-119195",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-119195",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}